113221013021 has 2 divisors, whose sum is σ = 113221013022. Its totient is φ = 113221013020.

The previous prime is 113221012991. The next prime is 113221013093. The reversal of 113221013021 is 120310122311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113185144900 + 35868121 = 336430^2 + 5989^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113221013021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113221018021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56610506510 + 56610506511.

It is an arithmetic number, because the mean of its divisors is an integer number (56610506511).

Almost surely, 2^113221013021 is an apocalyptic number.

It is an amenable number.

113221013021 is a deficient number, since it is larger than the sum of its proper divisors (1).

113221013021 is an equidigital number, since it uses as much as digits as its factorization.

113221013021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 113221013021 its reverse (120310122311), we get a palindrome (233531135332).

The spelling of 113221013021 in words is "one hundred thirteen billion, two hundred twenty-one million, thirteen thousand, twenty-one".