120221075691 has 24 divisors (see below), whose sum is σ = 180276778864. Its totient is φ = 80061696000.

The previous prime is 120221075617. The next prime is 120221075729. The reversal of 120221075691 is 196570122021.

It is not a de Polignac number, because 120221075691 - 2¹⁰ = 120221074667 is a prime.

It is a super-2 number, since 2×120221075691² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120226075691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36310 + ... + 491691.

Almost surely, 2^120221075691 is an apocalyptic number.

120221075691 is a deficient number, since it is larger than the sum of its proper divisors (60055703173).

120221075691 is an frugal number, since it uses more digits than its factorization.

120221075691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528953 (or 528941 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The spelling of 120221075691 in words is "one hundred twenty billion, two hundred twenty-one million, seventy-five thousand, six hundred ninety-one".