221020221020122 has 16 divisors (see below), whose sum is σ = 333579278878272. Its totient is φ = 109827380980800.

The previous prime is 221020221020113. The next prime is 221020221020167. The reversal of 221020221020122 is 221020122020122.

It is a self number, because there is not a number n which added to its sum of digits gives 221020221020122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61479504 + ... + 64975147.

It is an arithmetic number, because the mean of its divisors is an integer number (20848704929892).

Almost surely, 2^{221020221020122} is an apocalyptic number.

221020221020122 is a deficient number, since it is larger than the sum of its proper divisors (112559057858150).

221020221020122 is a wasteful number, since it uses less digits than its factorization.

221020221020122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126460053.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 221020221020122 its reverse (221020122020122), we get a palindrome (442040343040244).

The spelling of 221020221020122 in words is "two hundred twenty-one trillion, twenty billion, two hundred twenty-one million, twenty thousand, one hundred twenty-two".