72971203131121 has 8 divisors (see below), whose sum is σ = 73263108788064. Its totient is φ = 72679743474240.

The previous prime is 72971203131109. The next prime is 72971203131161. The reversal of 72971203131121 is 12113130217927.

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 72971203131121 - 2⁷ = 72971203130993 is a prime.

It is a super-3 number, since 3×72971203131121³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72971203131161) 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, 111172135 + ... + 111826588.

It is an arithmetic number, because the mean of its divisors is an integer number (9157888598508).

Almost surely, 2^{72971203131121} is an apocalyptic number.

It is an amenable number.

72971203131121 is a deficient number, since it is larger than the sum of its proper divisors (291905656943).

72971203131121 is a wasteful number, since it uses less digits than its factorization.

72971203131121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223000031.

The product of its (nonzero) digits is 31752, while the sum is 40.

The spelling of 72971203131121 in words is "seventy-two trillion, nine hundred seventy-one billion, two hundred three million, one hundred thirty-one thousand, one hundred twenty-one".