211012123320 has 96 divisors (see below), whose sum is σ = 704324293920. Its totient is φ = 54749088000.

The previous prime is 211012123279. The next prime is 211012123321. The reversal of 211012123320 is 23321210112.

211012123320 is a `hidden beast` number, since 21 + 101 + 212 + 332 + 0 = 666.

It is a super-2 number, since 2×211012123320² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 211012123293 and 211012123302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211012123321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7907556 + ... + 7934195.

It is an arithmetic number, because the mean of its divisors is an integer number (7336711395).

Almost surely, 2^211012123320 is an apocalyptic number.

211012123320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211012123320 is an abundant number, since it is smaller than the sum of its proper divisors (493312170600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211012123320 is a wasteful number, since it uses less digits than its factorization.

211012123320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15841805 (or 15841798 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 211012123320 its reverse (23321210112), we get a palindrome (234333333432).

The spelling of 211012123320 in words is "two hundred eleven billion, twelve million, one hundred twenty-three thousand, three hundred twenty".