120010001021 has 4 divisors (see below), whose sum is σ = 120020008032. Its totient is φ = 119999994012.

The previous prime is 120010001003. The next prime is 120010001039. The reversal of 120010001021 is 120100010021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (120010001003) and next prime (120010001039).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120010001021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120010001081) 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, 4985495 + ... + 5009508.

It is an arithmetic number, because the mean of its divisors is an integer number (30005002008).

Almost surely, 2^120010001021 is an apocalyptic number.

It is an amenable number.

120010001021 is a deficient number, since it is larger than the sum of its proper divisors (10007011).

120010001021 is an equidigital number, since it uses as much as digits as its factorization.

120010001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10007010.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 120010001021 its reverse (120100010021), we get a palindrome (240110011042).

The spelling of 120010001021 in words is "one hundred twenty billion, ten million, one thousand, twenty-one".