121616776 has 32 divisors (see below), whose sum is σ = 242301240. Its totient is φ = 57028608.

The previous prime is 121616773. The next prime is 121616797. The reversal of 121616776 is 677616121.

It can be written as a sum of positive squares in 4 ways, for example, as 92736900 + 28879876 = 9630^2 + 5374^2 .

It is not an unprimeable number, because it can be changed into a prime (121616773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41140 + ... + 43996.

Almost surely, 2^121616776 is an apocalyptic number.

It is an amenable number.

121616776 is a deficient number, since it is larger than the sum of its proper divisors (120684464).

121616776 is a wasteful number, since it uses less digits than its factorization.

121616776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3193 (or 3189 counting only the distinct ones).

The product of its digits is 21168, while the sum is 37.

The square root of 121616776 is about 11027.9996372869. Note that the first 3 decimals coincide. The cubic root of 121616776 is about 495.4477138325.

The spelling of 121616776 in words is "one hundred twenty-one million, six hundred sixteen thousand, seven hundred seventy-six".