120981668621 has 12 divisors (see below), whose sum is σ = 134270930976. Its totient is φ = 108915524520.

The previous prime is 120981668593. The next prime is 120981668657. The reversal of 120981668621 is 126866189021.

It is not a de Polignac number, because 120981668621 - 2¹⁸ = 120981406477 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 120981668621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120981668671) 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, 4841171 + ... + 4866096.

It is an arithmetic number, because the mean of its divisors is an integer number (11189244248).

Almost surely, 2^120981668621 is an apocalyptic number.

120981668621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120981668621 is a deficient number, since it is larger than the sum of its proper divisors (13289262355).

120981668621 is a wasteful number, since it uses less digits than its factorization.

120981668621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9707392 (or 9707381 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 50.

The spelling of 120981668621 in words is "one hundred twenty billion, nine hundred eighty-one million, six hundred sixty-eight thousand, six hundred twenty-one".