121602155999 has 2 divisors, whose sum is σ = 121602156000. Its totient is φ = 121602155998.

The previous prime is 121602155993. The next prime is 121602156029. The reversal of 121602155999 is 999551206121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121602155999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121602155993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60801077999 + 60801078000.

It is an arithmetic number, because the mean of its divisors is an integer number (60801078000).

Almost surely, 2^121602155999 is an apocalyptic number.

121602155999 is a deficient number, since it is larger than the sum of its proper divisors (1).

121602155999 is an equidigital number, since it uses as much as digits as its factorization.

121602155999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 437400, while the sum is 50.

The spelling of 121602155999 in words is "one hundred twenty-one billion, six hundred two million, one hundred fifty-five thousand, nine hundred ninety-nine".