121512215119 has 2 divisors, whose sum is σ = 121512215120. Its totient is φ = 121512215118.

The previous prime is 121512214987. The next prime is 121512215129. The reversal of 121512215119 is 911512215121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121512215119 - 2²⁵ = 121478660687 is a prime.

It is a super-2 number, since 2×121512215119² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121512215129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60756107559 + 60756107560.

It is an arithmetic number, because the mean of its divisors is an integer number (60756107560).

Almost surely, 2^121512215119 is an apocalyptic number.

121512215119 is a deficient number, since it is larger than the sum of its proper divisors (1).

121512215119 is an equidigital number, since it uses as much as digits as its factorization.

121512215119 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 31.

The spelling of 121512215119 in words is "one hundred twenty-one billion, five hundred twelve million, two hundred fifteen thousand, one hundred nineteen".