72221122012 has 24 divisors (see below), whose sum is σ = 136155264336. Its totient is φ = 33321504768.

The previous prime is 72221121991. The next prime is 72221122019. The reversal of 72221122012 is 21022112227.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72221122019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80293 + ... + 388444.

It is an arithmetic number, because the mean of its divisors is an integer number (5673136014).

Almost surely, 2^72221122012 is an apocalyptic number.

It is an amenable number.

72221122012 is a deficient number, since it is larger than the sum of its proper divisors (63934142324).

72221122012 is a wasteful number, since it uses less digits than its factorization.

72221122012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471717 (or 471715 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

Adding to 72221122012 its reverse (21022112227), we get a palindrome (93243234239).

The spelling of 72221122012 in words is "seventy-two billion, two hundred twenty-one million, one hundred twenty-two thousand, twelve".