21210041313 has 12 divisors (see below), whose sum is σ = 32438886948. Its totient is φ = 13308261120.

The previous prime is 21210041299. The next prime is 21210041323. The reversal of 21210041313 is 31314001212.

21210041313 is a `hidden beast` number, since 212 + 100 + 41 + 313 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 16653386304 + 4556655009 = 129048^2 + 67503^2 .

It is not a de Polignac number, because 21210041313 - 2⁸ = 21210041057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21210041323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69313708 + ... + 69314013.

It is an arithmetic number, because the mean of its divisors is an integer number (2703240579).

Almost surely, 2^21210041313 is an apocalyptic number.

It is an amenable number.

21210041313 is a deficient number, since it is larger than the sum of its proper divisors (11228845635).

21210041313 is a wasteful number, since it uses less digits than its factorization.

21210041313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138627744 (or 138627741 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21210041313 its reverse (31314001212), we get a palindrome (52524042525).

The spelling of 21210041313 in words is "twenty-one billion, two hundred ten million, forty-one thousand, three hundred thirteen".