120221075721 has 8 divisors (see below), whose sum is σ = 160731539584. Its totient is φ = 79928997840.

The previous prime is 120221075617. The next prime is 120221075729. The reversal of 120221075721 is 127570122021.

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

It is not a de Polignac number, because 120221075721 - 2¹⁴ = 120221059337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120221075729) 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, 54595210 + ... + 54597411.

It is an arithmetic number, because the mean of its divisors is an integer number (20091442448).

Almost surely, 2^120221075721 is an apocalyptic number.

It is an amenable number.

120221075721 is a deficient number, since it is larger than the sum of its proper divisors (40510463863).

120221075721 is a wasteful number, since it uses less digits than its factorization.

120221075721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109192991.

The product of its (nonzero) digits is 3920, while the sum is 30.

Adding to 120221075721 its reverse (127570122021), we get a palindrome (247791197742).

The spelling of 120221075721 in words is "one hundred twenty billion, two hundred twenty-one million, seventy-five thousand, seven hundred twenty-one".