72001223122 has 16 divisors (see below), whose sum is σ = 114364495512. Its totient is φ = 33880080640.

The previous prime is 72001223039. The next prime is 72001223141. The reversal of 72001223122 is 22132210027.

It can be written as a sum of positive squares in 4 ways, for example, as 42671578041 + 29329645081 = 206571^2 + 171259^2 .

It is a super-2 number, since 2×72001223122² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72001223093 and 72001223102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 353328 + ... + 518500.

Almost surely, 2^72001223122 is an apocalyptic number.

72001223122 is a deficient number, since it is larger than the sum of its proper divisors (42363272390).

72001223122 is a wasteful number, since it uses less digits than its factorization.

72001223122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178013.

The product of its (nonzero) digits is 672, while the sum is 22.

Adding to 72001223122 its reverse (22132210027), we get a palindrome (94133433149).

The spelling of 72001223122 in words is "seventy-two billion, one million, two hundred twenty-three thousand, one hundred twenty-two".