21310201252349 has 2 divisors, whose sum is σ = 21310201252350. Its totient is φ = 21310201252348.

The previous prime is 21310201252337. The next prime is 21310201252447. The reversal of 21310201252349 is 94325210201312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20556702602500 + 753498649849 = 4533950^2 + 868043^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21310201252349 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21310201251349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10655100626174 + 10655100626175.

It is an arithmetic number, because the mean of its divisors is an integer number (10655100626175).

Almost surely, 2^{21310201252349} is an apocalyptic number.

It is an amenable number.

21310201252349 is a deficient number, since it is larger than the sum of its proper divisors (1).

21310201252349 is an equidigital number, since it uses as much as digits as its factorization.

21310201252349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 35.

The spelling of 21310201252349 in words is "twenty-one trillion, three hundred ten billion, two hundred one million, two hundred fifty-two thousand, three hundred forty-nine".