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10212001231 = 19537473749
BaseRepresentation
bin10011000001010111…
…01100010111001111
3222100200200102010211
421200223230113033
5131403233014411
64405154343251
7511030402225
oct114053542717
928320612124
1010212001231
114370454743
121b8bb8ab27
13c698b71a3
146cc38ab15
153eb7d8221
hex260aec5cf

10212001231 has 4 divisors (see below), whose sum is σ = 10749475000. Its totient is φ = 9674527464.

The previous prime is 10212001169. The next prime is 10212001237. The reversal of 10212001231 is 13210021201.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 10212001231 - 29 = 10212000719 is a prime.

It is a super-2 number, since 2×102120012312 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10212001237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268736856 + ... + 268736893.

It is an arithmetic number, because the mean of its divisors is an integer number (2687368750).

Almost surely, 210212001231 is an apocalyptic number.

10212001231 is a deficient number, since it is larger than the sum of its proper divisors (537473769).

10212001231 is an equidigital number, since it uses as much as digits as its factorization.

10212001231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537473768.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 10212001231 its reverse (13210021201), we get a palindrome (23422022432).

The spelling of 10212001231 in words is "ten billion, two hundred twelve million, one thousand, two hundred thirty-one".

Divisors: 1 19 537473749 10212001231