113610421221 has 16 divisors (see below), whose sum is σ = 166617242688. Its totient is φ = 68854798320.

The previous prime is 113610421157. The next prime is 113610421237. The reversal of 113610421221 is 122124016311.

It is not a de Polignac number, because 113610421221 - 2⁶ = 113610421157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 113610421191 and 113610421200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113615421221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14222206 + ... + 14230191.

It is an arithmetic number, because the mean of its divisors is an integer number (10413577668).

Almost surely, 2^113610421221 is an apocalyptic number.

113610421221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

113610421221 is a deficient number, since it is larger than the sum of its proper divisors (53006821467).

113610421221 is an equidigital number, since it uses as much as digits as its factorization.

113610421221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28452433 (or 28452411 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

Adding to 113610421221 its reverse (122124016311), we get a palindrome (235734437532).

The spelling of 113610421221 in words is "one hundred thirteen billion, six hundred ten million, four hundred twenty-one thousand, two hundred twenty-one".