120002021 has 2 divisors, whose sum is σ = 120002022. Its totient is φ = 120002020.

The previous prime is 120001939. The next prime is 120002041. The reversal of 120002021 is 120200021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110460100 + 9541921 = 10510^2 + 3089^2 .

It is a cyclic number.

It is not a de Polignac number, because 120002021 - 2¹⁸ = 119739877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120002041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60001010 + 60001011.

It is an arithmetic number, because the mean of its divisors is an integer number (60001011).

Almost surely, 2^120002021 is an apocalyptic number.

It is an amenable number.

120002021 is a deficient number, since it is larger than the sum of its proper divisors (1).

120002021 is an equidigital number, since it uses as much as digits as its factorization.

120002021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 120002021 is about 10954.5433953223. The cubic root of 120002021 is about 493.2451838587.

Adding to 120002021 its reverse (120200021), we get a palindrome (240202042).

The spelling of 120002021 in words is "one hundred twenty million, two thousand, twenty-one".