21214242600025 has 6 divisors (see below), whose sum is σ = 26305660824062. Its totient is φ = 16971394080000.

The previous prime is 21214242599939. The next prime is 21214242600073. The reversal of 21214242600025 is 52000624241212.

It can be written as a sum of positive squares in 3 ways, for example, as 253301830681 + 20960940769344 = 503291^2 + 4578312^2 .

It is not a de Polignac number, because 21214242600025 - 2⁹ = 21214242599513 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21214242600025.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 424284851976 + ... + 424284852025.

Almost surely, 2^{21214242600025} is an apocalyptic number.

21214242600025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21214242600025 is a deficient number, since it is larger than the sum of its proper divisors (5091418224037).

21214242600025 is an equidigital number, since it uses as much as digits as its factorization.

21214242600025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848569704011 (or 848569704006 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

Adding to 21214242600025 its reverse (52000624241212), we get a palindrome (73214866841237).

The spelling of 21214242600025 in words is "twenty-one trillion, two hundred fourteen billion, two hundred forty-two million, six hundred thousand, twenty-five".