72122222100 has 36 divisors (see below), whose sum is σ = 208673630144. Its totient is φ = 19232592480.

The previous prime is 72122222099. The next prime is 72122222119. The reversal of 72122222100 is 122222127.

It is a super-2 number, since 2×72122222100² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120203404 + ... + 120204003.

Almost surely, 2^72122222100 is an apocalyptic number.

It is an amenable number.

72122222100 is an abundant number, since it is smaller than the sum of its proper divisors (136551408044).

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

72122222100 is a wasteful number, since it uses less digits than its factorization.

72122222100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240407424 (or 240407417 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 21.

Adding to 72122222100 its reverse (122222127), we get a palindrome (72244444227).

The spelling of 72122222100 in words is "seventy-two billion, one hundred twenty-two million, two hundred twenty-two thousand, one hundred".