22001021002 has 16 divisors (see below), whose sum is σ = 34977483720. Its totient is φ = 10343144448.

The previous prime is 22001020997. The next prime is 22001021011. The reversal of 22001021002 is 20012010022.

It can be written as a sum of positive squares in 4 ways, for example, as 21993186601 + 7834401 = 148301^2 + 2799^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22001021002.

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, 286353 + ... + 354964.

Almost surely, 2^22001021002 is an apocalyptic number.

22001021002 is a deficient number, since it is larger than the sum of its proper divisors (12976462718).

22001021002 is a wasteful number, since it uses less digits than its factorization.

22001021002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642345.

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

Adding to 22001021002 its reverse (20012010022), we get a palindrome (42013031024).

The spelling of 22001021002 in words is "twenty-two billion, one million, twenty-one thousand, two".