23121021314357 has 2 divisors, whose sum is σ = 23121021314358. Its totient is φ = 23121021314356.

The previous prime is 23121021314329. The next prime is 23121021314359. The reversal of 23121021314357 is 75341312012132.

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., 21237295259236 + 1883726055121 = 4608394^2 + 1372489^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23121021314357 is a prime.

Together with 23121021314359, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23121021314359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11560510657178 + 11560510657179.

It is an arithmetic number, because the mean of its divisors is an integer number (11560510657179).

Almost surely, 2^{23121021314357} is an apocalyptic number.

It is an amenable number.

23121021314357 is a deficient number, since it is larger than the sum of its proper divisors (1).

23121021314357 is an equidigital number, since it uses as much as digits as its factorization.

23121021314357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 35.

Adding to 23121021314357 its reverse (75341312012132), we get a palindrome (98462333326489).

The spelling of 23121021314357 in words is "twenty-three trillion, one hundred twenty-one billion, twenty-one million, three hundred fourteen thousand, three hundred fifty-seven".