20221221002 has 16 divisors (see below), whose sum is σ = 30821436672. Its totient is φ = 9948659760.

The previous prime is 20221220989. The next prime is 20221221049. The reversal of 20221221002 is 20012212202.

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, 280274 + ... + 344957.

It is an arithmetic number, because the mean of its divisors is an integer number (1926339792).

Almost surely, 2^20221221002 is an apocalyptic number.

20221221002 is a deficient number, since it is larger than the sum of its proper divisors (10600215670).

20221221002 is a wasteful number, since it uses less digits than its factorization.

20221221002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625493.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20221221002 its reverse (20012212202), we get a palindrome (40233433204).

The spelling of 20221221002 in words is "twenty billion, two hundred twenty-one million, two hundred twenty-one thousand, two".