113031031021 has 4 divisors (see below), whose sum is σ = 116677193344. Its totient is φ = 109384868700.

The previous prime is 113031030977. The next prime is 113031031037. The reversal of 113031031021 is 120130130311.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120130130311 = 241 ⋅498465271.

It is a cyclic number.

It is not a de Polignac number, because 113031031021 - 2¹¹ = 113031028973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113031030986 and 113031031004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113031061021) 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, 1823081115 + ... + 1823081176.

It is an arithmetic number, because the mean of its divisors is an integer number (29169298336).

Almost surely, 2^113031031021 is an apocalyptic number.

It is an amenable number.

113031031021 is a deficient number, since it is larger than the sum of its proper divisors (3646162323).

113031031021 is an equidigital number, since it uses as much as digits as its factorization.

113031031021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3646162322.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 113031031021 its reverse (120130130311), we get a palindrome (233161161332).

The spelling of 113031031021 in words is "one hundred thirteen billion, thirty-one million, thirty-one thousand, twenty-one".