113211321021 has 12 divisors (see below), whose sum is σ = 167947125372. Its totient is φ = 73434370176.

The previous prime is 113211321011. The next prime is 113211321059. The reversal of 113211321021 is 120123112311.

113211321021 is a `hidden beast` number, since 1 + 1 + 321 + 1 + 321 + 0 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 91376825796 + 21834495225 = 302286^2 + 147765^2 .

It is not a de Polignac number, because 113211321021 - 2²² = 113207126717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 113211320985 and 113211321003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113211321011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 169986636 + ... + 169987301.

It is an arithmetic number, because the mean of its divisors is an integer number (13995593781).

Almost surely, 2^113211321021 is an apocalyptic number.

It is an amenable number.

113211321021 is a deficient number, since it is larger than the sum of its proper divisors (54735804351).

113211321021 is a wasteful number, since it uses less digits than its factorization.

113211321021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339973980 (or 339973977 counting only the distinct ones).

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

Adding to 113211321021 its reverse (120123112311), we get a palindrome (233334433332).

The spelling of 113211321021 in words is "one hundred thirteen billion, two hundred eleven million, three hundred twenty-one thousand, twenty-one".