221013220122 has 24 divisors (see below), whose sum is σ = 478894313664. Its totient is φ = 73666098504.

The previous prime is 221013220093. The next prime is 221013220171. The reversal of 221013220122 is 221022310122.

221013220122 is a `hidden beast` number, since 221 + 0 + 1 + 322 + 0 + 122 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 221013220095 and 221013220104.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 135538 + ... + 678525.

It is an arithmetic number, because the mean of its divisors is an integer number (19953929736).

Almost surely, 2^221013220122 is an apocalyptic number.

221013220122 is an abundant number, since it is smaller than the sum of its proper divisors (257881093542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221013220122 is a wasteful number, since it uses less digits than its factorization.

221013220122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829154 (or 829151 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 221013220122 its reverse (221022310122), we get a palindrome (442035530244).

The spelling of 221013220122 in words is "two hundred twenty-one billion, thirteen million, two hundred twenty thousand, one hundred twenty-two".