113111122221 has 32 divisors (see below), whose sum is σ = 176790144000. Its totient is φ = 71277199344.

The previous prime is 113111122133. The next prime is 113111122247. The reversal of 113111122221 is 122221111311.

It is a happy number.

113111122221 is a `hidden beast` number, since 11 + 311 + 1 + 122 + 221 = 666.

It is not a de Polignac number, because 113111122221 - 2²⁵ = 113077567789 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 113111122194 and 113111122203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113111122291) 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, 21601 + ... + 476118.

It is an arithmetic number, because the mean of its divisors is an integer number (5524692000).

Almost surely, 2^113111122221 is an apocalyptic number.

It is an amenable number.

113111122221 is a deficient number, since it is larger than the sum of its proper divisors (63679021779).

113111122221 is a wasteful number, since it uses less digits than its factorization.

113111122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498190 (or 498184 counting only the distinct ones).

The product of its digits is 48, while the sum is 18.

Adding to 113111122221 its reverse (122221111311), we get a palindrome (235332233532).

The spelling of 113111122221 in words is "one hundred thirteen billion, one hundred eleven million, one hundred twenty-two thousand, two hundred twenty-one".