2120120001 has 10 divisors (see below), whose sum is σ = 3167092962. Its totient is φ = 1413413280.

The previous prime is 2120119951. The next prime is 2120120011. The reversal of 2120120001 is 1000210212.

It can be written as a sum of positive squares in only one way, i.e., 2102681025 + 17438976 = 45855^2 + 4176^2 .

It is not a de Polignac number, because 2120120001 - 2²¹ = 2118022849 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 (2120120011) 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 9 ways as a sum of consecutive naturals, for example, 13087080 + ... + 13087241.

Almost surely, 2^2120120001 is an apocalyptic number.

It is an amenable number.

2120120001 is a deficient number, since it is larger than the sum of its proper divisors (1046972961).

2120120001 is an equidigital number, since it uses as much as digits as its factorization.

2120120001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26174333 (or 26174324 counting only the distinct ones).

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

The square root of 2120120001 is about 46044.7608420328. The cubic root of 2120120001 is about 1284.6558957903.

Adding to 2120120001 its reverse (1000210212), we get a palindrome (3120330213).

The spelling of 2120120001 in words is "two billion, one hundred twenty million, one hundred twenty thousand, one".