121396878712 has 16 divisors (see below), whose sum is σ = 227635002360. Its totient is φ = 60694211424.

The previous prime is 121396878679. The next prime is 121396878763. The reversal of 121396878712 is 217878693121.

It is a super-2 number, since 2×121396878712² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 404758 + ... + 637669.

Almost surely, 2^121396878712 is an apocalyptic number.

It is an amenable number.

121396878712 is a deficient number, since it is larger than the sum of its proper divisors (106238123648).

121396878712 is a wasteful number, since it uses less digits than its factorization.

121396878712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056990 (or 1056986 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 55.

The spelling of 121396878712 in words is "one hundred twenty-one billion, three hundred ninety-six million, eight hundred seventy-eight thousand, seven hundred twelve".