121692519121 has 2 divisors, whose sum is σ = 121692519122. Its totient is φ = 121692519120.

The previous prime is 121692519089. The next prime is 121692519133. The reversal of 121692519121 is 121915296121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118704366225 + 2988152896 = 344535^2 + 54664^2 .

It is a cyclic number.

It is not a de Polignac number, because 121692519121 - 2⁵ = 121692519089 is a prime.

It is a super-2 number, since 2×121692519121² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121692519181) 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, 60846259560 + 60846259561.

It is an arithmetic number, because the mean of its divisors is an integer number (60846259561).

Almost surely, 2^121692519121 is an apocalyptic number.

It is an amenable number.

121692519121 is a deficient number, since it is larger than the sum of its proper divisors (1).

121692519121 is an equidigital number, since it uses as much as digits as its factorization.

121692519121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 40.

The spelling of 121692519121 in words is "one hundred twenty-one billion, six hundred ninety-two million, five hundred nineteen thousand, one hundred twenty-one".