21142311135125 has 16 divisors (see below), whose sum is σ = 26388307325952. Its totient is φ = 16912116197200.

The previous prime is 21142311135061. The next prime is 21142311135139. The reversal of 21142311135125 is 52153111324112.

It is not a de Polignac number, because 21142311135125 - 2⁶ = 21142311135061 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21142311135091 and 21142311135100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7437797 + ... + 9879546.

It is an arithmetic number, because the mean of its divisors is an integer number (1649269207872).

Almost surely, 2^{21142311135125} is an apocalyptic number.

21142311135125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21142311135125 is a deficient number, since it is larger than the sum of its proper divisors (5245996190827).

21142311135125 is an equidigital number, since it uses as much as digits as its factorization.

21142311135125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17327125 (or 17327115 counting only the distinct ones).

The product of its digits is 7200, while the sum is 32.

Adding to 21142311135125 its reverse (52153111324112), we get a palindrome (73295422459237).

The spelling of 21142311135125 in words is "twenty-one trillion, one hundred forty-two billion, three hundred eleven million, one hundred thirty-five thousand, one hundred twenty-five".