121561022776 has 16 divisors (see below), whose sum is σ = 234087105240. Its totient is φ = 59137794720.

The previous prime is 121561022663. The next prime is 121561022777. The reversal of 121561022776 is 677220165121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121561022777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205339270 + ... + 205339861.

Almost surely, 2^121561022776 is an apocalyptic number.

It is an amenable number.

121561022776 is a deficient number, since it is larger than the sum of its proper divisors (112526082464).

121561022776 is a wasteful number, since it uses less digits than its factorization.

121561022776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410679174 (or 410679170 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 40.

Adding to 121561022776 its reverse (677220165121), we get a palindrome (798781187897).

The spelling of 121561022776 in words is "one hundred twenty-one billion, five hundred sixty-one million, twenty-two thousand, seven hundred seventy-six".