113212121133 has 4 divisors (see below), whose sum is σ = 150949494848. Its totient is φ = 75474747420.

The previous prime is 113212121111. The next prime is 113212121153. The reversal of 113212121133 is 331121212311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 113212121133 - 2⁸ = 113212120877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113212121153) 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, 18868686853 + ... + 18868686858.

It is an arithmetic number, because the mean of its divisors is an integer number (37737373712).

Almost surely, 2^113212121133 is an apocalyptic number.

It is an amenable number.

113212121133 is a deficient number, since it is larger than the sum of its proper divisors (37737373715).

113212121133 is an equidigital number, since it uses as much as digits as its factorization.

113212121133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37737373714.

The product of its digits is 216, while the sum is 21.

Adding to 113212121133 its reverse (331121212311), we get a palindrome (444333333444).

The spelling of 113212121133 in words is "one hundred thirteen billion, two hundred twelve million, one hundred twenty-one thousand, one hundred thirty-three".