120193921 has 4 divisors (see below), whose sum is σ = 120481200. Its totient is φ = 119906644.

The previous prime is 120193897. The next prime is 120193933. The reversal of 120193921 is 129391021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 129391021 = 6037 ⋅21433.

It is a cyclic number.

It is not a de Polignac number, because 120193921 - 2⁵ = 120193889 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 120193921.

It is not an unprimeable number, because it can be changed into a prime (120193991) 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, 143011 + ... + 143848.

It is an arithmetic number, because the mean of its divisors is an integer number (30120300).

Almost surely, 2^120193921 is an apocalyptic number.

It is an amenable number.

120193921 is a deficient number, since it is larger than the sum of its proper divisors (287279).

120193921 is an equidigital number, since it uses as much as digits as its factorization.

120193921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287278.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 120193921 is about 10963.2988192423. The cubic root of 120193921 is about 493.5079664905.

The spelling of 120193921 in words is "one hundred twenty million, one hundred ninety-three thousand, nine hundred twenty-one".