120101721 has 8 divisors (see below), whose sum is σ = 162525984. Its totient is φ = 78872640.

The previous prime is 120101701. The next prime is 120101749. The reversal of 120101721 is 127101021.

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

It is not a de Polignac number, because 120101721 - 2¹⁴ = 120085337 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 120101721.

It is not an unprimeable number, because it can be changed into a prime (120101701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 298560 + ... + 298961.

It is an arithmetic number, because the mean of its divisors is an integer number (20315748).

Almost surely, 2^120101721 is an apocalyptic number.

It is an amenable number.

120101721 is a deficient number, since it is larger than the sum of its proper divisors (42424263).

120101721 is an equidigital number, since it uses as much as digits as its factorization.

120101721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597591.

The product of its (nonzero) digits is 28, while the sum is 15.

The square root of 120101721 is about 10959.0930737904. The cubic root of 120101721 is about 493.3817452592.

Adding to 120101721 its reverse (127101021), we get a palindrome (247202742).

It can be divided in two parts, 12010 and 1721, that added together give a palindrome (13731).

The spelling of 120101721 in words is "one hundred twenty million, one hundred one thousand, seven hundred twenty-one".