21761363374121 has 8 divisors (see below), whose sum is σ = 24875171193024. Its totient is φ = 18648815960880.

The previous prime is 21761363374117. The next prime is 21761363374141. The reversal of 21761363374121 is 12147336316712.

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

It is not a de Polignac number, because 21761363374121 - 2² = 21761363374117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21761363374141) 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, 315064415 + ... + 315133476.

It is an arithmetic number, because the mean of its divisors is an integer number (3109396399128).

Almost surely, 2^{21761363374121} is an apocalyptic number.

It is an amenable number.

21761363374121 is a deficient number, since it is larger than the sum of its proper divisors (3113807818903).

21761363374121 is an equidigital number, since it uses as much as digits as its factorization.

21761363374121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630202831.

The product of its digits is 762048, while the sum is 47.

The spelling of 21761363374121 in words is "twenty-one trillion, seven hundred sixty-one billion, three hundred sixty-three million, three hundred seventy-four thousand, one hundred twenty-one".