21113022422431 has 4 divisors (see below), whose sum is σ = 21197138049864. Its totient is φ = 21028906795000.

The previous prime is 21113022422411. The next prime is 21113022422519. The reversal of 21113022422431 is 13422422031112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21113022422431 - 2¹⁵ = 21113022389663 is a prime.

It is a super-2 number, since 2×21113022422431² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21113022422431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113022422411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42057813340 + ... + 42057813841.

It is an arithmetic number, because the mean of its divisors is an integer number (5299284512466).

Almost surely, 2^{21113022422431} is an apocalyptic number.

21113022422431 is a deficient number, since it is larger than the sum of its proper divisors (84115627433).

21113022422431 is an equidigital number, since it uses as much as digits as its factorization.

21113022422431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84115627432.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 21113022422431 its reverse (13422422031112), we get a palindrome (34535444453543).

The spelling of 21113022422431 in words is "twenty-one trillion, one hundred thirteen billion, twenty-two million, four hundred twenty-two thousand, four hundred thirty-one".