21113245425 has 12 divisors (see below), whose sum is σ = 34907232560. Its totient is φ = 11260397520.

The previous prime is 21113245411. The next prime is 21113245441. The reversal of 21113245425 is 52454231112.

It is not a de Polignac number, because 21113245425 - 2⁸ = 21113245169 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21113245392 and 21113245401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 140754895 + ... + 140755044.

Almost surely, 2^21113245425 is an apocalyptic number.

21113245425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21113245425 is a deficient number, since it is larger than the sum of its proper divisors (13793987135).

21113245425 is a wasteful number, since it uses less digits than its factorization.

21113245425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281509952 (or 281509947 counting only the distinct ones).

The product of its digits is 9600, while the sum is 30.

Adding to 21113245425 its reverse (52454231112), we get a palindrome (73567476537).

The spelling of 21113245425 in words is "twenty-one billion, one hundred thirteen million, two hundred forty-five thousand, four hundred twenty-five".