72122612302221 has 64 divisors (see below), whose sum is σ = 110029028997888. Its totient is φ = 41628973068288.

The previous prime is 72122612302217. The next prime is 72122612302229. The reversal of 72122612302221 is 12220321622127.

It is not a de Polignac number, because 72122612302221 - 2² = 72122612302217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72122612302229) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1285740451 + ... + 1285796543.

It is an arithmetic number, because the mean of its divisors is an integer number (1719203578092).

Almost surely, 2^{72122612302221} is an apocalyptic number.

It is an amenable number.

72122612302221 is a deficient number, since it is larger than the sum of its proper divisors (37906416695667).

72122612302221 is a wasteful number, since it uses less digits than its factorization.

72122612302221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62750.

The product of its (nonzero) digits is 16128, while the sum is 33.

Adding to 72122612302221 its reverse (12220321622127), we get a palindrome (84342933924348).

The spelling of 72122612302221 in words is "seventy-two trillion, one hundred twenty-two billion, six hundred twelve million, three hundred two thousand, two hundred twenty-one".