120002021001 has 24 divisors (see below), whose sum is σ = 177587524296. Its totient is φ = 78039740160.

The previous prime is 120002020991. The next prime is 120002021003. The reversal of 120002021001 is 100120200021.

It can be written as a sum of positive squares in 4 ways, for example, as 40449254400 + 79552766601 = 201120^2 + 282051^2 .

It is not a de Polignac number, because 120002021001 - 2⁶ = 120002020937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (120002021003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3574771 + ... + 3608183.

It is an arithmetic number, because the mean of its divisors is an integer number (7399480179).

Almost surely, 2^120002021001 is an apocalyptic number.

It is an amenable number.

120002021001 is a deficient number, since it is larger than the sum of its proper divisors (57585503295).

120002021001 is a wasteful number, since it uses less digits than its factorization.

120002021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43193 (or 43190 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 120002021001 its reverse (100120200021), we get a palindrome (220122221022).

The spelling of 120002021001 in words is "one hundred twenty billion, two million, twenty-one thousand, one".