121813776 has 60 divisors (see below), whose sum is σ = 389613952. Its totient is φ = 34803648.

The previous prime is 121813771. The next prime is 121813793. The reversal of 121813776 is 677318121.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 121813776.

It is not an unprimeable number, because it can be changed into a prime (121813771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59416 + ... + 61431.

Almost surely, 2^121813776 is an apocalyptic number.

121813776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121813776 is an abundant number, since it is smaller than the sum of its proper divisors (267800176).

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

121813776 is a wasteful number, since it uses less digits than its factorization.

121813776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120868 (or 120859 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 121813776 is about 11036.9278334145. The cubic root of 121813776 is about 495.7150852419.

The spelling of 121813776 in words is "one hundred twenty-one million, eight hundred thirteen thousand, seven hundred seventy-six".