20201221102 has 16 divisors (see below), whose sum is σ = 30868024320. Its totient is φ = 9912464248.

The previous prime is 20201221093. The next prime is 20201221171. The reversal of 20201221102 is 20112210202.

It is a happy number.

It is a congruent number.

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, 76558 + ... + 215089.

It is an arithmetic number, because the mean of its divisors is an integer number (1929251520).

Almost surely, 2^20201221102 is an apocalyptic number.

20201221102 is a deficient number, since it is larger than the sum of its proper divisors (10666803218).

20201221102 is a wasteful number, since it uses less digits than its factorization.

20201221102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292295.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20201221102 its reverse (20112210202), we get a palindrome (40313431304).

The spelling of 20201221102 in words is "twenty billion, two hundred one million, two hundred twenty-one thousand, one hundred two".