2021923054961 has 8 divisors (see below), whose sum is σ = 2090506338600. Its totient is φ = 1954073282688.

The previous prime is 2021923054909. The next prime is 2021923054973. The reversal of 2021923054961 is 1694503291202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 722744820736 + 1299178234225 = 850144^2 + 1139815^2 .

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

It is not a de Polignac number, because 2021923054961 - 2¹⁸ = 2021922792817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021923054061) 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, 183372236 + ... + 183383261.

It is an arithmetic number, because the mean of its divisors is an integer number (261313292325).

Almost surely, 2^{2021923054961} is an apocalyptic number.

It is an amenable number.

2021923054961 is a deficient number, since it is larger than the sum of its proper divisors (68583283639).

2021923054961 is a wasteful number, since it uses less digits than its factorization.

2021923054961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366755683.

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 2021923054961 in words is "two trillion, twenty-one billion, nine hundred twenty-three million, fifty-four thousand, nine hundred sixty-one".