221021111110122 has 48 divisors (see below), whose sum is σ = 485497475150688. Its totient is φ = 72658597214880.

The previous prime is 221021111110069. The next prime is 221021111110139. The reversal of 221021111110122 is 221011111120122.

It is a happy number.

221021111110122 is a `hidden beast` number, since 2 + 210 + 211 + 11 + 110 + 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 = 221021111110095 and 221021111110104.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 128690853 + ... + 130397000.

It is an arithmetic number, because the mean of its divisors is an integer number (10114530732306).

Almost surely, 2^{221021111110122} is an apocalyptic number.

221021111110122 is an abundant number, since it is smaller than the sum of its proper divisors (264476364040566).

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

221021111110122 is a wasteful number, since it uses less digits than its factorization.

221021111110122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259088515 (or 259088512 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 221021111110122 its reverse (221011111120122), we get a palindrome (442032222230244).

The spelling of 221021111110122 in words is "two hundred twenty-one trillion, twenty-one billion, one hundred eleven million, one hundred ten thousand, one hundred twenty-two".