21140525140331 has 4 divisors (see below), whose sum is σ = 21218534458464. Its totient is φ = 21062515822200.

The previous prime is 21140525140313. The next prime is 21140525140439. The reversal of 21140525140331 is 13304152504112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21140525140331 is a prime.

It is a super-2 number, since 2×21140525140331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21140525340331) 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, 39004658660 + ... + 39004659201.

It is an arithmetic number, because the mean of its divisors is an integer number (5304633614616).

Almost surely, 2^{21140525140331} is an apocalyptic number.

21140525140331 is a deficient number, since it is larger than the sum of its proper divisors (78009318133).

21140525140331 is an equidigital number, since it uses as much as digits as its factorization.

21140525140331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78009318132.

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 21140525140331 its reverse (13304152504112), we get a palindrome (34444677644443).

The spelling of 21140525140331 in words is "twenty-one trillion, one hundred forty billion, five hundred twenty-five million, one hundred forty thousand, three hundred thirty-one".