120121723 has 4 divisors (see below), whose sum is σ = 120197808. Its totient is φ = 120045640.

The previous prime is 120121697. The next prime is 120121739. The reversal of 120121723 is 327121021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120121723 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 120121723.

It is not an unprimeable number, because it can be changed into a prime (120121753) 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, 35623 + ... + 38848.

It is an arithmetic number, because the mean of its divisors is an integer number (30049452).

Almost surely, 2^120121723 is an apocalyptic number.

120121723 is a deficient number, since it is larger than the sum of its proper divisors (76085).

120121723 is an equidigital number, since it uses as much as digits as its factorization.

120121723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76084.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 120121723 is about 10960.0056113124. The cubic root of 120121723 is about 493.4091333593.

Adding to 120121723 its reverse (327121021), we get a palindrome (447242744).

The spelling of 120121723 in words is "one hundred twenty million, one hundred twenty-one thousand, seven hundred twenty-three".