21413777371361 has 8 divisors (see below), whose sum is σ = 21758864811264. Its totient is φ = 21069439308720.

The previous prime is 21413777371249. The next prime is 21413777371387. The reversal of 21413777371361 is 16317377731412.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21413777371361 is a prime.

It is a super-2 number, since 2×21413777371361² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21413777373361) 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, 187286705 + ... + 187401006.

It is an arithmetic number, because the mean of its divisors is an integer number (2719858101408).

Almost surely, 2^{21413777371361} is an apocalyptic number.

It is an amenable number.

21413777371361 is a deficient number, since it is larger than the sum of its proper divisors (345087439903).

21413777371361 is an equidigital number, since it uses as much as digits as its factorization.

21413777371361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374688631.

The product of its digits is 3111696, while the sum is 53.

The spelling of 21413777371361 in words is "twenty-one trillion, four hundred thirteen billion, seven hundred seventy-seven million, three hundred seventy-one thousand, three hundred sixty-one".