113221420021 has 4 divisors (see below), whose sum is σ = 115140427200. Its totient is φ = 111302412844.

The previous prime is 113221419991. The next prime is 113221420087. The reversal of 113221420021 is 120024122311.

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 a cyclic number.

It is not a de Polignac number, because 113221420021 - 2⁵ = 113221419989 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 (113221420121) 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, 959503501 + ... + 959503618.

It is an arithmetic number, because the mean of its divisors is an integer number (28785106800).

Almost surely, 2^113221420021 is an apocalyptic number.

It is an amenable number.

113221420021 is a deficient number, since it is larger than the sum of its proper divisors (1919007179).

113221420021 is an equidigital number, since it uses as much as digits as its factorization.

113221420021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1919007178.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 113221420021 its reverse (120024122311), we get a palindrome (233245542332).

The spelling of 113221420021 in words is "one hundred thirteen billion, two hundred twenty-one million, four hundred twenty thousand, twenty-one".