120661643442 has 8 divisors (see below), whose sum is σ = 241323286896. Its totient is φ = 40220547812.

The previous prime is 120661643339. The next prime is 120661643513. The reversal of 120661643442 is 244346166021.

It is a sphenic number, since it is the product of 3 distinct primes.

120661643442 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 120661643442.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10055136948 + ... + 10055136959.

It is an arithmetic number, because the mean of its divisors is an integer number (30165410862).

Almost surely, 2^120661643442 is an apocalyptic number.

120661643442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

120661643442 is a wasteful number, since it uses less digits than its factorization.

120661643442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20110273912.

The product of its (nonzero) digits is 165888, while the sum is 39.

The spelling of 120661643442 in words is "one hundred twenty billion, six hundred sixty-one million, six hundred forty-three thousand, four hundred forty-two".