121761780712 has 64 divisors (see below), whose sum is σ = 268269019200. Its totient is φ = 51078858240.

The previous prime is 121761780709. The next prime is 121761780731. The reversal of 121761780712 is 217087167121.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10254603 + ... + 10266469.

It is an arithmetic number, because the mean of its divisors is an integer number (4191703425).

Almost surely, 2^121761780712 is an apocalyptic number.

It is an amenable number.

121761780712 is an abundant number, since it is smaller than the sum of its proper divisors (146507238488).

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

121761780712 is a wasteful number, since it uses less digits than its factorization.

121761780712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20866 (or 20862 counting only the distinct ones).

The product of its (nonzero) digits is 65856, while the sum is 43.

The spelling of 121761780712 in words is "one hundred twenty-one billion, seven hundred sixty-one million, seven hundred eighty thousand, seven hundred twelve".