72220606200721 has 8 divisors (see below), whose sum is σ = 78852490019424. Its totient is φ = 65599784742720.

The previous prime is 72220606200683. The next prime is 72220606200737. The reversal of 72220606200721 is 12700260602227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72220606200721 - 2⁹ = 72220606200209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72220606210721) 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, 2765576520 + ... + 2765602633.

It is an arithmetic number, because the mean of its divisors is an integer number (9856561252428).

Almost surely, 2^{72220606200721} is an apocalyptic number.

It is an amenable number.

72220606200721 is a deficient number, since it is larger than the sum of its proper divisors (6631883818703).

72220606200721 is a wasteful number, since it uses less digits than its factorization.

72220606200721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5531180351.

The product of its (nonzero) digits is 56448, while the sum is 37.

Adding to 72220606200721 its reverse (12700260602227), we get a palindrome (84920866802948).

The spelling of 72220606200721 in words is "seventy-two trillion, two hundred twenty billion, six hundred six million, two hundred thousand, seven hundred twenty-one".