121677316376656 has 80 divisors (see below), whose sum is σ = 244040846100480. Its totient is φ = 58725153446400.

The previous prime is 121677316376599. The next prime is 121677316376657. The reversal of 121677316376656 is 656673613776121.

It is a junction number, because it is equal to n+sod(n) for n = 121677316376591 and 121677316376600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121677316376657) 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, 2093920530 + ... + 2093978638.

It is an arithmetic number, because the mean of its divisors is an integer number (3050510576256).

Almost surely, 2^{121677316376656} is an apocalyptic number.

121677316376656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121677316376656 is an abundant number, since it is smaller than the sum of its proper divisors (122363529723824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121677316376656 is a wasteful number, since it uses less digits than its factorization.

121677316376656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86132 (or 86126 counting only the distinct ones).

The product of its digits is 240045120, while the sum is 67.

The spelling of 121677316376656 in words is "one hundred twenty-one trillion, six hundred seventy-seven billion, three hundred sixteen million, three hundred seventy-six thousand, six hundred fifty-six".