22100021012 has 24 divisors (see below), whose sum is σ = 41119986600. Its totient is φ = 10356848640.

The previous prime is 22100020997. The next prime is 22100021077. The reversal of 22100021012 is 21012000122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5364976516 + 16735044496 = 73246^2 + 129364^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22100020984 and 22100021002.

It is a congruent number.

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, 657887 + ... + 690662.

It is an arithmetic number, because the mean of its divisors is an integer number (1713332775).

Almost surely, 2^22100021012 is an apocalyptic number.

It is an amenable number.

22100021012 is a deficient number, since it is larger than the sum of its proper divisors (19019965588).

22100021012 is a wasteful number, since it uses less digits than its factorization.

22100021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1348811 (or 1348809 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 22100021012 its reverse (21012000122), we get a palindrome (43112021134).

The spelling of 22100021012 in words is "twenty-two billion, one hundred million, twenty-one thousand, twelve".