21002114025 has 48 divisors (see below), whose sum is σ = 38639491200. Its totient is φ = 11184338880.

The previous prime is 21002114017. The next prime is 21002114027. The reversal of 21002114025 is 52041120012.

It is not a de Polignac number, because 21002114025 - 2³ = 21002114017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21002113989 and 21002114007.

It is not an unprimeable number, because it can be changed into a prime (21002114027) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 433996 + ... + 479954.

It is an arithmetic number, because the mean of its divisors is an integer number (804989400).

Almost surely, 2^21002114025 is an apocalyptic number.

21002114025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21002114025 is a deficient number, since it is larger than the sum of its proper divisors (17637377175).

21002114025 is a wasteful number, since it uses less digits than its factorization.

21002114025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46655 (or 46644 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

Adding to 21002114025 its reverse (52041120012), we get a palindrome (73043234037).

The spelling of 21002114025 in words is "twenty-one billion, two million, one hundred fourteen thousand, twenty-five".