113312231001221 has 12 divisors (see below), whose sum is σ = 139565845147788. Its totient is φ = 91411547697792.

The previous prime is 113312231001181. The next prime is 113312231001239. The reversal of 113312231001221 is 122100132213311.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 36648022245121 + 76664208756100 = 6053761^2 + 8755810^2 .

It is not a de Polignac number, because 113312231001221 - 2¹⁴ = 113312230984837 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 (113312231091221) 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, 68014543586 + ... + 68014545251.

It is an arithmetic number, because the mean of its divisors is an integer number (11630487095649).

Almost surely, 2^{113312231001221} is an apocalyptic number.

It is an amenable number.

113312231001221 is a deficient number, since it is larger than the sum of its proper divisors (26253614146567).

113312231001221 is a wasteful number, since it uses less digits than its factorization.

113312231001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136029088868 (or 136029088861 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 113312231001221 its reverse (122100132213311), we get a palindrome (235412363214532).

The spelling of 113312231001221 in words is "one hundred thirteen trillion, three hundred twelve billion, two hundred thirty-one million, one thousand, two hundred twenty-one".