105512531412 has 24 divisors (see below), whose sum is σ = 246534573376. Its totient is φ = 35122462848.

The previous prime is 105512531407. The next prime is 105512531447. The reversal of 105512531412 is 214135215501.

It is a super-2 number, since 2×105512531412² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 105512531412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6038533 + ... + 6055980.

Almost surely, 2^105512531412 is an apocalyptic number.

105512531412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

105512531412 is an abundant number, since it is smaller than the sum of its proper divisors (141022041964).

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

105512531412 is a wasteful number, since it uses less digits than its factorization.

105512531412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12095247 (or 12095245 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 30.

Adding to 105512531412 its reverse (214135215501), we get a palindrome (319647746913).

The spelling of 105512531412 in words is "one hundred five billion, five hundred twelve million, five hundred thirty-one thousand, four hundred twelve".