21310201252345 has 32 divisors (see below), whose sum is σ = 25767869817600. Its totient is φ = 16918276951296.

The previous prime is 21310201252337. The next prime is 21310201252349. The reversal of 21310201252345 is 54325210201312.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21310201252345 - 2³ = 21310201252337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21310201252349) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1612082146 + ... + 1612095364.

It is an arithmetic number, because the mean of its divisors is an integer number (805245931800).

Almost surely, 2^{21310201252345} is an apocalyptic number.

It is an amenable number.

21310201252345 is a deficient number, since it is larger than the sum of its proper divisors (4457668565255).

21310201252345 is a wasteful number, since it uses less digits than its factorization.

21310201252345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18097.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 21310201252345 its reverse (54325210201312), we get a palindrome (75635411453657).

The spelling of 21310201252345 in words is "twenty-one trillion, three hundred ten billion, two hundred one million, two hundred fifty-two thousand, three hundred forty-five".