20211220122 has 32 divisors (see below), whose sum is σ = 40802553792. Its totient is φ = 6674016384.

The previous prime is 20211220063. The next prime is 20211220147. The reversal of 20211220122 is 22102211202.

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, 238713 + ... + 312099.

It is an arithmetic number, because the mean of its divisors is an integer number (1275079806).

Almost surely, 2^20211220122 is an apocalyptic number.

20211220122 is an abundant number, since it is smaller than the sum of its proper divisors (20591333670).

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

20211220122 is a wasteful number, since it uses less digits than its factorization.

20211220122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73822.

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

Adding to 20211220122 its reverse (22102211202), we get a palindrome (42313431324).

The spelling of 20211220122 in words is "twenty billion, two hundred eleven million, two hundred twenty thousand, one hundred twenty-two".