21041202313 has 2 divisors, whose sum is σ = 21041202314. Its totient is φ = 21041202312.

The previous prime is 21041202293. The next prime is 21041202317. The reversal of 21041202313 is 31320214012.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17963504784 + 3077697529 = 134028^2 + 55477^2 .

It is a cyclic number.

It is not a de Polignac number, because 21041202313 - 2²¹ = 21039105161 is a prime.

It is not a weakly prime, because it can be changed into another prime (21041202317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10520601156 + 10520601157.

It is an arithmetic number, because the mean of its divisors is an integer number (10520601157).

Almost surely, 2^21041202313 is an apocalyptic number.

It is an amenable number.

21041202313 is a deficient number, since it is larger than the sum of its proper divisors (1).

21041202313 is an equidigital number, since it uses as much as digits as its factorization.

21041202313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21041202313 its reverse (31320214012), we get a palindrome (52361416325).

The spelling of 21041202313 in words is "twenty-one billion, forty-one million, two hundred two thousand, three hundred thirteen".