21214036536425 has 12 divisors (see below), whose sum is σ = 26665753325340. Its totient is φ = 16738746635520.

The previous prime is 21214036536403. The next prime is 21214036536449. The reversal of 21214036536425 is 52463563041212.

It can be written as a sum of positive squares in 6 ways, for example, as 4480897276969 + 16733139259456 = 2116813^2 + 4090616^2 .

It is not a de Polignac number, because 21214036536425 - 2³⁶ = 21145317059689 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5812062980 + ... + 5812066629.

It is an arithmetic number, because the mean of its divisors is an integer number (2222146110445).

Almost surely, 2^{21214036536425} is an apocalyptic number.

21214036536425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21214036536425 is a deficient number, since it is larger than the sum of its proper divisors (5451716788915).

21214036536425 is a wasteful number, since it uses less digits than its factorization.

21214036536425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11624129692 (or 11624129687 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 44.

Adding to 21214036536425 its reverse (52463563041212), we get a palindrome (73677599577637).

The spelling of 21214036536425 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, five hundred thirty-six thousand, four hundred twenty-five".