113310221221 has 4 divisors (see below), whose sum is σ = 113965193772. Its totient is φ = 112655248672.

The previous prime is 113310221179. The next prime is 113310221231. The reversal of 113310221221 is 122122013311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122122013311 = 977 ⋅124996943.

It can be written as a sum of positive squares in 2 ways, for example, as 73609658721 + 39700562500 = 271311^2 + 199250^2 .

It is a cyclic number.

It is not a de Polignac number, because 113310221221 - 2¹⁷ = 113310090149 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 (113310221231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327486016 + ... + 327486361.

It is an arithmetic number, because the mean of its divisors is an integer number (28491298443).

Almost surely, 2^113310221221 is an apocalyptic number.

It is an amenable number.

113310221221 is a deficient number, since it is larger than the sum of its proper divisors (654972551).

113310221221 is an equidigital number, since it uses as much as digits as its factorization.

113310221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654972550.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 113310221221 its reverse (122122013311), we get a palindrome (235432234532).

The spelling of 113310221221 in words is "one hundred thirteen billion, three hundred ten million, two hundred twenty-one thousand, two hundred twenty-one".