120021331 has 4 divisors (see below), whose sum is σ = 120072600. Its totient is φ = 119970064.

The previous prime is 120021323. The next prime is 120021359. The reversal of 120021331 is 133120021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133120021 = 23 ⋅5787827.

It is a cyclic number.

It is not a de Polignac number, because 120021331 - 2³ = 120021323 is a prime.

It is a super-2 number, since 2×120021331² = 28810239790023122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120021371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21946 + ... + 26863.

It is an arithmetic number, because the mean of its divisors is an integer number (30018150).

Almost surely, 2^120021331 is an apocalyptic number.

120021331 is a deficient number, since it is larger than the sum of its proper divisors (51269).

120021331 is an equidigital number, since it uses as much as digits as its factorization.

120021331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51268.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 120021331 is about 10955.4247293293. The cubic root of 120021331 is about 493.2716391177.

Adding to 120021331 its reverse (133120021), we get a palindrome (253141352).

The spelling of 120021331 in words is "one hundred twenty million, twenty-one thousand, three hundred thirty-one".