120021313221 has 16 divisors (see below), whose sum is σ = 178388548800. Its totient is φ = 79753570704.

The previous prime is 120021313213. The next prime is 120021313229. The reversal of 120021313221 is 122313120021.

It is an interprime number because it is at equal distance from previous prime (120021313213) and next prime (120021313229).

It is not a de Polignac number, because 120021313221 - 2³ = 120021313213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120021313194 and 120021313203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120021313229) 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 15 ways as a sum of consecutive naturals, for example, 7231506 + ... + 7248083.

It is an arithmetic number, because the mean of its divisors is an integer number (11149284300).

Almost surely, 2^120021313221 is an apocalyptic number.

It is an amenable number.

120021313221 is a deficient number, since it is larger than the sum of its proper divisors (58367235579).

120021313221 is a wasteful number, since it uses less digits than its factorization.

120021313221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14479905 (or 14479899 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 120021313221 its reverse (122313120021), we get a palindrome (242334433242).

The spelling of 120021313221 in words is "one hundred twenty billion, twenty-one million, three hundred thirteen thousand, two hundred twenty-one".