120531155221 has 8 divisors (see below), whose sum is σ = 121780454400. Its totient is φ = 119287791600.

The previous prime is 120531155177. The next prime is 120531155231. The reversal of 120531155221 is 122551135021.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 120531155221 - 2⁷ = 120531155093 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 120531155221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120531155231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1443061 + ... + 1524298.

It is an arithmetic number, because the mean of its divisors is an integer number (15222556800).

Almost surely, 2^120531155221 is an apocalyptic number.

It is an amenable number.

120531155221 is a deficient number, since it is larger than the sum of its proper divisors (1249299179).

120531155221 is a wasteful number, since it uses less digits than its factorization.

120531155221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2967779.

The product of its (nonzero) digits is 3000, while the sum is 28.

The spelling of 120531155221 in words is "one hundred twenty billion, five hundred thirty-one million, one hundred fifty-five thousand, two hundred twenty-one".