21320122401140 has 24 divisors (see below), whose sum is σ = 44772343880712. Its totient is φ = 8528032419840.

The previous prime is 21320122401107. The next prime is 21320122401143. The reversal of 21320122401140 is 4110422102312.

It can be written as a sum of positive squares in 4 ways, for example, as 604170416656 + 20715951984484 = 777284^2 + 4551478^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320122401143) 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, 19091000 + ... + 20176880.

It is an arithmetic number, because the mean of its divisors is an integer number (1865514328363).

Almost surely, 2^{21320122401140} is an apocalyptic number.

21320122401140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21320122401140 is an abundant number, since it is smaller than the sum of its proper divisors (23452221479572).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21320122401140 is a wasteful number, since it uses less digits than its factorization.

21320122401140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2067587 (or 2067585 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 21320122401140 its reverse (4110422102312), we get a palindrome (25430544503452).

The spelling of 21320122401140 in words is "twenty-one trillion, three hundred twenty billion, one hundred twenty-two million, four hundred one thousand, one hundred forty".