121772425499 has 2 divisors, whose sum is σ = 121772425500. Its totient is φ = 121772425498.

The previous prime is 121772425493. The next prime is 121772425517. The reversal of 121772425499 is 994524277121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121772425499 is a prime.

It is a super-2 number, since 2×121772425499² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121772425499.

It is not a weakly prime, because it can be changed into another prime (121772425493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60886212749 + 60886212750.

It is an arithmetic number, because the mean of its divisors is an integer number (60886212750).

Almost surely, 2^121772425499 is an apocalyptic number.

121772425499 is a deficient number, since it is larger than the sum of its proper divisors (1).

121772425499 is an equidigital number, since it uses as much as digits as its factorization.

121772425499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2540160, while the sum is 53.

The spelling of 121772425499 in words is "one hundred twenty-one billion, seven hundred seventy-two million, four hundred twenty-five thousand, four hundred ninety-nine".