120102001021 has 4 divisors (see below), whose sum is σ = 120261924544. Its totient is φ = 119942077500.

The previous prime is 120102000989. The next prime is 120102001039. The reversal of 120102001021 is 120100201021.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120100201021 = 293 ⋅409898297.

It is a cyclic number.

It is not a de Polignac number, because 120102001021 - 2⁵ = 120102000989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120102000989 and 120102001007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120102001051) 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 3 ways as a sum of consecutive naturals, for example, 79960635 + ... + 79962136.

It is an arithmetic number, because the mean of its divisors is an integer number (30065481136).

Almost surely, 2^120102001021 is an apocalyptic number.

It is an amenable number.

120102001021 is a deficient number, since it is larger than the sum of its proper divisors (159923523).

120102001021 is an equidigital number, since it uses as much as digits as its factorization.

120102001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159923522.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 120102001021 its reverse (120100201021), we get a palindrome (240202202042).

The spelling of 120102001021 in words is "one hundred twenty billion, one hundred two million, one thousand, twenty-one".