2021874132091 has 8 divisors (see below), whose sum is σ = 2223909640368. Its totient is φ = 1838067391600.

The previous prime is 2021874132073. The next prime is 2021874132121. The reversal of 2021874132091 is 1902314781202.

It is not a de Polignac number, because 2021874132091 - 2⁹ = 2021874131579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021874132071) 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, 759530650 + ... + 759533311.

It is an arithmetic number, because the mean of its divisors is an integer number (277988705046).

Almost surely, 2^{2021874132091} is an apocalyptic number.

2021874132091 is a deficient number, since it is larger than the sum of its proper divisors (202035508277).

2021874132091 is an equidigital number, since it uses as much as digits as its factorization.

2021874132091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1519063994 (or 1519063972 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The spelling of 2021874132091 in words is "two trillion, twenty-one billion, eight hundred seventy-four million, one hundred thirty-two thousand, ninety-one".