22021321000 has 64 divisors (see below), whose sum is σ = 58891322880. Its totient is φ = 7550164800.

The previous prime is 22021320989. The next prime is 22021321001. The reversal of 22021321000 is 12312022.

It is not an unprimeable number, because it can be changed into a prime (22021321001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1565952 + ... + 1579951.

It is an arithmetic number, because the mean of its divisors is an integer number (920176920).

Almost surely, 2^22021321000 is an apocalyptic number.

22021321000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22021321000 is an abundant number, since it is smaller than the sum of its proper divisors (36870001880).

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

22021321000 is a wasteful number, since it uses less digits than its factorization.

22021321000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3145931 (or 3145917 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 22021321000 its reverse (12312022), we get a palindrome (22033633022).

The spelling of 22021321000 in words is "twenty-two billion, twenty-one million, three hundred twenty-one thousand".