113212011231 has 20 divisors (see below), whose sum is σ = 184493649384. Its totient is φ = 68613339600.

The previous prime is 113212011181. The next prime is 113212011299. The reversal of 113212011231 is 132110212311.

It is not a de Polignac number, because 113212011231 - 2¹³ = 113212003039 is a prime.

It is a super-2 number, since 2×113212011231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113212011131) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 63529980 + ... + 63531761.

Almost surely, 2^113212011231 is an apocalyptic number.

113212011231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

113212011231 is a deficient number, since it is larger than the sum of its proper divisors (71281638153).

113212011231 is a wasteful number, since it uses less digits than its factorization.

113212011231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127061764 (or 127061755 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 113212011231 its reverse (132110212311), we get a palindrome (245322223542).

The spelling of 113212011231 in words is "one hundred thirteen billion, two hundred twelve million, eleven thousand, two hundred thirty-one".