21314127425 has 24 divisors (see below), whose sum is σ = 27074552832. Its totient is φ = 16639560000.

The previous prime is 21314127421. The next prime is 21314127427. The reversal of 21314127425 is 52472141312.

It is a happy number.

It is not a de Polignac number, because 21314127425 - 2² = 21314127421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21314127391 and 21314127400.

It is not an unprimeable number, because it can be changed into a prime (21314127421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 138650 + ... + 248700.

It is an arithmetic number, because the mean of its divisors is an integer number (1128106368).

Almost surely, 2^21314127425 is an apocalyptic number.

21314127425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21314127425 is a deficient number, since it is larger than the sum of its proper divisors (5760425407).

21314127425 is a wasteful number, since it uses less digits than its factorization.

21314127425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110249 (or 110244 counting only the distinct ones).

The product of its digits is 13440, while the sum is 32.

Adding to 21314127425 its reverse (52472141312), we get a palindrome (73786268737).

The spelling of 21314127425 in words is "twenty-one billion, three hundred fourteen million, one hundred twenty-seven thousand, four hundred twenty-five".