2120120021001 has 16 divisors (see below), whose sum is σ = 2898595671104. Its totient is φ = 1377963823104.

The previous prime is 2120120020969. The next prime is 2120120021011. The reversal of 2120120021001 is 1001200210212.

It is not a de Polignac number, because 2120120021001 - 2⁵ = 2120120020969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2120120021011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54350920 + ... + 54389913.

It is an arithmetic number, because the mean of its divisors is an integer number (181162229444).

Almost surely, 2^{2120120021001} is an apocalyptic number.

It is an amenable number.

2120120021001 is a deficient number, since it is larger than the sum of its proper divisors (778475650103).

2120120021001 is a wasteful number, since it uses less digits than its factorization.

2120120021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108741000.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2120120021001 its reverse (1001200210212), we get a palindrome (3121320231213).

The spelling of 2120120021001 in words is "two trillion, one hundred twenty billion, one hundred twenty million, twenty-one thousand, one".