121615265423 has 2 divisors, whose sum is σ = 121615265424. Its totient is φ = 121615265422.

The previous prime is 121615265411. The next prime is 121615265461. The reversal of 121615265423 is 324562516121.

It is an a-pointer prime, because the next prime (121615265461) can be obtained adding 121615265423 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121615265423 - 2¹⁶ = 121615199887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121615265623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60807632711 + 60807632712.

It is an arithmetic number, because the mean of its divisors is an integer number (60807632712).

Almost surely, 2^121615265423 is an apocalyptic number.

121615265423 is a deficient number, since it is larger than the sum of its proper divisors (1).

121615265423 is an equidigital number, since it uses as much as digits as its factorization.

121615265423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86400, while the sum is 38.

The spelling of 121615265423 in words is "one hundred twenty-one billion, six hundred fifteen million, two hundred sixty-five thousand, four hundred twenty-three".