4099907372021 has 16 divisors (see below), whose sum is σ = 4211763333120. Its totient is φ = 3988620545280.

The previous prime is 4099907371999. The next prime is 4099907372023. The reversal of 4099907372021 is 1202737099904.

It is a cyclic number.

It is not a de Polignac number, because 4099907372021 - 2³⁸ = 3825029465077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4099907372023) 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, 81771866 + ... + 81821988.

It is an arithmetic number, because the mean of its divisors is an integer number (263235208320).

Almost surely, 2^{4099907372021} is an apocalyptic number.

4099907372021 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

4099907372021 is a deficient number, since it is larger than the sum of its proper divisors (111855961099).

4099907372021 is a wasteful number, since it uses less digits than its factorization.

4099907372021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55756.

The product of its (nonzero) digits is 1714608, while the sum is 53.

The spelling of 4099907372021 in words is "four trillion, ninety-nine billion, nine hundred seven million, three hundred seventy-two thousand, twenty-one".