72122012 has 12 divisors (see below), whose sum is σ = 126278880. Its totient is φ = 36042336.

The previous prime is 72122009. The next prime is 72122033. The reversal of 72122012 is 21022127.

It is a super-2 number, since 2×72122012² = 10403169229856288, which 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 3 ways as a sum of consecutive naturals, for example, 7613 + ... + 14219.

It is an arithmetic number, because the mean of its divisors is an integer number (10523240).

Almost surely, 2^72122012 is an apocalyptic number.

It is an amenable number.

72122012 is a deficient number, since it is larger than the sum of its proper divisors (54156868).

72122012 is a wasteful number, since it uses less digits than its factorization.

72122012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9340 (or 9338 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 72122012 is about 8492.4679569605. The cubic root of 72122012 is about 416.2516275371.

Adding to 72122012 its reverse (21022127), we get a palindrome (93144139).

The spelling of 72122012 in words is "seventy-two million, one hundred twenty-two thousand, twelve".