22021021000 has 64 divisors (see below), whose sum is σ = 56213688960. Its totient is φ = 8007640000.

The previous prime is 22021020977. The next prime is 22021021013. The reversal of 22021021000 is 12012022.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 989956 + ... + 1011955.

It is an arithmetic number, because the mean of its divisors is an integer number (878338890).

Almost surely, 2^22021021000 is an apocalyptic number.

22021021000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22021021000 is an abundant number, since it is smaller than the sum of its proper divisors (34192667960).

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

22021021000 is a wasteful number, since it uses less digits than its factorization.

22021021000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2001943 (or 2001929 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 22021021000 its reverse (12012022), we get a palindrome (22033033022).

The spelling of 22021021000 in words is "twenty-two billion, twenty-one million, twenty-one thousand".