121650487902784 has 21 divisors (see below), whose sum is σ = 241400362025971. Its totient is φ = 60825199833280.

The previous prime is 121650487902761. The next prime is 121650487902787. The reversal of 121650487902784 is 487209784056121.

The square root of 121650487902784 is 11029528.

It is a perfect power (a square), and thus also a powerful number.

121650487902784 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121650487902787) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 87546879 + ... + 88925569.

Almost surely, 2^{121650487902784} is an apocalyptic number.

121650487902784 is the 11029528-th square number.

It is an amenable number.

121650487902784 is a deficient number, since it is larger than the sum of its proper divisors (119749874123187).

121650487902784 is an frugal number, since it uses more digits than its factorization.

121650487902784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2757394 (or 1378693 counting only the distinct ones).

The product of its (nonzero) digits is 54190080, while the sum is 64.

121650487902784 divided by its sum of digits (64) gives a square (1900788873481 = 1378691²).

The spelling of 121650487902784 in words is "one hundred twenty-one trillion, six hundred fifty billion, four hundred eighty-seven million, nine hundred two thousand, seven hundred eighty-four".