7811200021149 has 16 divisors (see below), whose sum is σ = 13225312205440. Its totient is φ = 4463542869120.

The previous prime is 7811200021147. The next prime is 7811200021169. The reversal of 7811200021149 is 9411200021187.

It is not a de Polignac number, because 7811200021149 - 2¹ = 7811200021147 is a prime.

It is a super-2 number, since 2×7811200021149² (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 (7811200021147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20664550132 + ... + 20664550509.

It is an arithmetic number, because the mean of its divisors is an integer number (826582012840).

Almost surely, 2^{7811200021149} is an apocalyptic number.

It is an amenable number.

7811200021149 is a deficient number, since it is larger than the sum of its proper divisors (5414112184291).

7811200021149 is a wasteful number, since it uses less digits than its factorization.

7811200021149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41329100657 (or 41329100651 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The spelling of 7811200021149 in words is "seven trillion, eight hundred eleven billion, two hundred million, twenty-one thousand, one hundred forty-nine".