21072160715061 has 8 divisors (see below), whose sum is σ = 28096338840640. Its totient is φ = 14048044866432.

The previous prime is 21072160715033. The next prime is 21072160715069. The reversal of 21072160715061 is 16051706127012.

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

It is not a de Polignac number, because 21072160715061 - 2⁵ = 21072160715029 is a prime.

It is a super-2 number, since 2×21072160715061² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21072160715069) 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, 14773921 + ... + 16137318.

It is an arithmetic number, because the mean of its divisors is an integer number (3512042355080).

Almost surely, 2^{21072160715061} is an apocalyptic number.

It is an amenable number.

21072160715061 is a deficient number, since it is larger than the sum of its proper divisors (7024178125579).

21072160715061 is a wasteful number, since it uses less digits than its factorization.

21072160715061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31138475.

The product of its (nonzero) digits is 35280, while the sum is 39.

The spelling of 21072160715061 in words is "twenty-one trillion, seventy-two billion, one hundred sixty million, seven hundred fifteen thousand, sixty-one".