21320022024261 has 8 divisors (see below), whose sum is σ = 31585217813760. Its totient is φ = 14213348016156.

The previous prime is 21320022024227. The next prime is 21320022024277. The reversal of 21320022024261 is 16242022002312.

21320022024261 is a `hidden beast` number, since 2 + 1 + 32 + 0 + 0 + 2 + 202 + 426 + 1 = 666.

It is not a de Polignac number, because 21320022024261 - 2³³ = 21311432089669 is a prime.

It is a super-2 number, since 2×21320022024261² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 789630445343 = 21320022024261 / (2 + 1 + 3 + 2 + 0 + 0 + 2 + 2 + 0 + 2 + 4 + 2 + 6 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320022024361) 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, 394815222645 + ... + 394815222698.

It is an arithmetic number, because the mean of its divisors is an integer number (3948152226720).

Almost surely, 2^{21320022024261} is an apocalyptic number.

It is an amenable number.

21320022024261 is a deficient number, since it is larger than the sum of its proper divisors (10265195789499).

21320022024261 is an equidigital number, since it uses as much as digits as its factorization.

21320022024261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789630445352 (or 789630445346 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 21320022024261 its reverse (16242022002312), we get a palindrome (37562044026573).

The spelling of 21320022024261 in words is "twenty-one trillion, three hundred twenty billion, twenty-two million, twenty-four thousand, two hundred sixty-one".