72154316121 has 8 divisors (see below), whose sum is σ = 97104874464. Its totient is φ = 47653317600.

The previous prime is 72154316107. The next prime is 72154316141. The reversal of 72154316121 is 12161345127.

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

It is not a de Polignac number, because 72154316121 - 2⁵ = 72154316089 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72154316141) 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, 112389580 + ... + 112390221.

It is an arithmetic number, because the mean of its divisors is an integer number (12138109308).

Almost surely, 2^72154316121 is an apocalyptic number.

It is an amenable number.

72154316121 is a deficient number, since it is larger than the sum of its proper divisors (24950558343).

72154316121 is a wasteful number, since it uses less digits than its factorization.

72154316121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224779911.

The product of its digits is 10080, while the sum is 33.

The spelling of 72154316121 in words is "seventy-two billion, one hundred fifty-four million, three hundred sixteen thousand, one hundred twenty-one".