121396878711 has 16 divisors (see below), whose sum is σ = 183673766400. Its totient is φ = 79209310104.

The previous prime is 121396878679. The next prime is 121396878763. The reversal of 121396878711 is 117878693121.

It is not a de Polignac number, because 121396878711 - 2⁵ = 121396878679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121396878781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47830441 + ... + 47832978.

It is an arithmetic number, because the mean of its divisors is an integer number (11479610400).

Almost surely, 2^121396878711 is an apocalyptic number.

121396878711 is a deficient number, since it is larger than the sum of its proper divisors (62276887689).

121396878711 is an equidigital number, since it uses as much as digits as its factorization.

121396878711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95663475 (or 95663469 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 54.

The spelling of 121396878711 in words is "one hundred twenty-one billion, three hundred ninety-six million, eight hundred seventy-eight thousand, seven hundred eleven".