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211212211012 = 221143111634361
BaseRepresentation
bin1100010010110100111…
…0101001001101000100
3202012011202001000111221
43010231032221031010
511430030311223022
6241010214410124
721155015112565
oct3045516511504
9665152030457
10211212211012
11816358722a0
1234b26660944
1316bc01b7b6a
14a31923216c
155762980cc7
hex312d3a9344

211212211012 has 24 divisors (see below), whose sum is σ = 412600601952. Its totient is φ = 93772862400.

The previous prime is 211212210973. The next prime is 211212211037. The reversal of 211212211012 is 210112212112.

It is a super-2 number, since 2×2112122110122 (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55815289 + ... + 55819072.

It is an arithmetic number, because the mean of its divisors is an integer number (17191691748).

Almost surely, 2211212211012 is an apocalyptic number.

211212211012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

211212211012 is a deficient number, since it is larger than the sum of its proper divisors (201388390940).

211212211012 is a wasteful number, since it uses less digits than its factorization.

211212211012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111634419 (or 111634417 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 211212211012 its reverse (210112212112), we get a palindrome (421324423124).

It can be divided in two parts, 211212 and 211012, that added together give a palindrome (422224).

The spelling of 211212211012 in words is "two hundred eleven billion, two hundred twelve million, two hundred eleven thousand, twelve".

Divisors: 1 2 4 11 22 43 44 86 172 473 946 1892 111634361 223268722 446537444 1227977971 2455955942 4800277523 4911911884 9600555046 19201110092 52803052753 105606105506 211212211012