120010021221 has 24 divisors (see below), whose sum is σ = 171539172640. Its totient is φ = 74609517312.

The previous prime is 120010021199. The next prime is 120010021231. The reversal of 120010021221 is 122120010021.

It is not a de Polignac number, because 120010021221 - 2¹⁹ = 120009496933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120010021197 and 120010021206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120010021231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 540451 + ... + 729456.

Almost surely, 2^120010021221 is an apocalyptic number.

It is an amenable number.

120010021221 is a deficient number, since it is larger than the sum of its proper divisors (51529151419).

120010021221 is a wasteful number, since it uses less digits than its factorization.

120010021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270053 (or 1270036 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 120010021221 its reverse (122120010021), we get a palindrome (242130031242).

The spelling of 120010021221 in words is "one hundred twenty billion, ten million, twenty-one thousand, two hundred twenty-one".