113321313021 has 32 divisors (see below), whose sum is σ = 174282882048. Its totient is φ = 64155611520.

The previous prime is 113321313011. The next prime is 113321313031. The reversal of 113321313021 is 120313123311.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (113321313011) and next prime (113321313031).

It is not a de Polignac number, because 113321313021 - 2¹⁵ = 113321280253 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113321313011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1663986 + ... + 1730748.

It is an arithmetic number, because the mean of its divisors is an integer number (5446340064).

Almost surely, 2^113321313021 is an apocalyptic number.

It is an amenable number.

113321313021 is a deficient number, since it is larger than the sum of its proper divisors (60961569027).

113321313021 is a wasteful number, since it uses less digits than its factorization.

113321313021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67521.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 113321313021 its reverse (120313123311), we get a palindrome (233634436332).

The spelling of 113321313021 in words is "one hundred thirteen billion, three hundred twenty-one million, three hundred thirteen thousand, twenty-one".