21113100414425 has 24 divisors (see below), whose sum is σ = 27814984887000. Its totient is φ = 15867291847680.

The previous prime is 21113100414407. The next prime is 21113100414433. The reversal of 21113100414425 is 52441400131112.

It can be written as a sum of positive squares in 12 ways, for example, as 6170693191744 + 14942407222681 = 2484088^2 + 3865541^2 .

It is not a de Polignac number, because 21113100414425 - 2⁴² = 16715053903321 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 393507200 + ... + 393560849.

It is an arithmetic number, because the mean of its divisors is an integer number (1158957703625).

Almost surely, 2^{21113100414425} is an apocalyptic number.

21113100414425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21113100414425 is a deficient number, since it is larger than the sum of its proper divisors (6701884472575).

21113100414425 is a wasteful number, since it uses less digits than its factorization.

21113100414425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787068125 (or 787068120 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

Adding to 21113100414425 its reverse (52441400131112), we get a palindrome (73554500545537).

The spelling of 21113100414425 in words is "twenty-one trillion, one hundred thirteen billion, one hundred million, four hundred fourteen thousand, four hundred twenty-five".