11720510670021 has 16 divisors (see below), whose sum is σ = 15673567896000. Its totient is φ = 7790567735808.

The previous prime is 11720510669971. The next prime is 11720510670047. The reversal of 11720510670021 is 12007601502711.

It is not a de Polignac number, because 11720510670021 - 2³⁰ = 11719436928197 is a prime.

It is a super-2 number, since 2×11720510670021² (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 (11720510670061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10985205 + ... + 12004821.

It is an arithmetic number, because the mean of its divisors is an integer number (979597993500).

Almost surely, 2^{11720510670021} is an apocalyptic number.

It is an amenable number.

11720510670021 is a deficient number, since it is larger than the sum of its proper divisors (3953057225979).

11720510670021 is a wasteful number, since it uses less digits than its factorization.

11720510670021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1030948.

The product of its (nonzero) digits is 5880, while the sum is 33.

The spelling of 11720510670021 in words is "eleven trillion, seven hundred twenty billion, five hundred ten million, six hundred seventy thousand, twenty-one".