23121544426787 has 2 divisors, whose sum is σ = 23121544426788. Its totient is φ = 23121544426786.

The previous prime is 23121544426753. The next prime is 23121544426789. The reversal of 23121544426787 is 78762444512132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23121544426787 - 2¹⁴ = 23121544410403 is a prime.

Together with 23121544426789, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23121544426789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11560772213393 + 11560772213394.

It is an arithmetic number, because the mean of its divisors is an integer number (11560772213394).

Almost surely, 2^{23121544426787} is an apocalyptic number.

23121544426787 is a deficient number, since it is larger than the sum of its proper divisors (1).

23121544426787 is an equidigital number, since it uses as much as digits as its factorization.

23121544426787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18063360, while the sum is 56.

The spelling of 23121544426787 in words is "twenty-three trillion, one hundred twenty-one billion, five hundred forty-four million, four hundred twenty-six thousand, seven hundred eighty-seven".