12720175802781 has 8 divisors (see below), whose sum is σ = 17128157517024. Its totient is φ = 8396155645200.

The previous prime is 12720175802767. The next prime is 12720175802897. The reversal of 12720175802781 is 18720857102721.

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

It is not a de Polignac number, because 12720175802781 - 2⁶ = 12720175802717 is a prime.

It is a super-2 number, since 2×12720175802781² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12720175803781) 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, 20990388811 + ... + 20990389416.

It is an arithmetic number, because the mean of its divisors is an integer number (2141019689628).

Almost surely, 2^{12720175802781} is an apocalyptic number.

It is an amenable number.

12720175802781 is a deficient number, since it is larger than the sum of its proper divisors (4407981714243).

12720175802781 is a wasteful number, since it uses less digits than its factorization.

12720175802781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41980778331.

The product of its (nonzero) digits is 878080, while the sum is 51.

The spelling of 12720175802781 in words is "twelve trillion, seven hundred twenty billion, one hundred seventy-five million, eight hundred two thousand, seven hundred eighty-one".