21220210122 has 32 divisors (see below), whose sum is σ = 42662358720. Its totient is φ = 7036498560.

The previous prime is 21220210087. The next prime is 21220210133. The reversal of 21220210122 is 22101202212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1033468 + ... + 1053800.

It is an arithmetic number, because the mean of its divisors is an integer number (1333198710).

Almost surely, 2^21220210122 is an apocalyptic number.

21220210122 is an abundant number, since it is smaller than the sum of its proper divisors (21442148598).

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

21220210122 is a wasteful number, since it uses less digits than its factorization.

21220210122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21238.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21220210122 its reverse (22101202212), we get a palindrome (43321412334).

The spelling of 21220210122 in words is "twenty-one billion, two hundred twenty million, two hundred ten thousand, one hundred twenty-two".