7987106911021 has 8 divisors (see below), whose sum is σ = 9128141015360. Its totient is φ = 6846077514528.

The previous prime is 7987106911019. The next prime is 7987106911051. The reversal of 7987106911021 is 1201196017897.

It is a happy number.

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

It is not a de Polignac number, because 7987106911021 - 2¹ = 7987106911019 is a prime.

It is a super-2 number, since 2×7987106911021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7987106911021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7987106911051) 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, 3943870 + ... + 5615008.

It is an arithmetic number, because the mean of its divisors is an integer number (1141017626920).

Almost surely, 2^{7987106911021} is an apocalyptic number.

It is an amenable number.

7987106911021 is a deficient number, since it is larger than the sum of its proper divisors (1141034104339).

7987106911021 is a wasteful number, since it uses less digits than its factorization.

7987106911021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2353923.

The product of its (nonzero) digits is 381024, while the sum is 52.

The spelling of 7987106911021 in words is "seven trillion, nine hundred eighty-seven billion, one hundred six million, nine hundred eleven thousand, twenty-one".