21004134141313 has 2 divisors, whose sum is σ = 21004134141314. Its totient is φ = 21004134141312.

The previous prime is 21004134141247. The next prime is 21004134141323. The reversal of 21004134141313 is 31314143140012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17246553492609 + 3757580648704 = 4152897^2 + 1938448^2 .

It is a cyclic number.

It is not a de Polignac number, because 21004134141313 - 2²⁹ = 21003597270401 is a prime.

It is not a weakly prime, because it can be changed into another prime (21004134141323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10502067070656 + 10502067070657.

It is an arithmetic number, because the mean of its divisors is an integer number (10502067070657).

Almost surely, 2^{21004134141313} is an apocalyptic number.

It is an amenable number.

21004134141313 is a deficient number, since it is larger than the sum of its proper divisors (1).

21004134141313 is an equidigital number, since it uses as much as digits as its factorization.

21004134141313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 21004134141313 its reverse (31314143140012), we get a palindrome (52318277281325).

The spelling of 21004134141313 in words is "twenty-one trillion, four billion, one hundred thirty-four million, one hundred forty-one thousand, three hundred thirteen".