22002021000 has 96 divisors (see below), whose sum is σ = 74366861400. Its totient is φ = 5867203200.

The previous prime is 22002020981. The next prime is 22002021031. The reversal of 22002021000 is 12020022.

It can be written as a sum of positive squares in 4 ways, for example, as 2024460036 + 19977560964 = 44994^2 + 141342^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1213335 + ... + 1231334.

Almost surely, 2^22002021000 is an apocalyptic number.

22002021000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22002021000 is an abundant number, since it is smaller than the sum of its proper divisors (52364840400).

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

22002021000 is a wasteful number, since it uses less digits than its factorization.

22002021000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2444696 (or 2444679 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 22002021000 its reverse (12020022), we get a palindrome (22014041022).

The spelling of 22002021000 in words is "twenty-two billion, two million, twenty-one thousand".