2120120111001 has 4 divisors (see below), whose sum is σ = 2826826814672. Its totient is φ = 1413413407332.

The previous prime is 2120120110961. The next prime is 2120120111029. The reversal of 2120120111001 is 1001110210212.

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 a de Polignac number, because none of the positive numbers 2^k-2120120111001 is a prime.

It is a super-2 number, since 2×2120120111001² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2120120111201) 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, 353353351831 + ... + 353353351836.

It is an arithmetic number, because the mean of its divisors is an integer number (706706703668).

Almost surely, 2^{2120120111001} is an apocalyptic number.

It is an amenable number.

2120120111001 is a deficient number, since it is larger than the sum of its proper divisors (706706703671).

2120120111001 is an equidigital number, since it uses as much as digits as its factorization.

2120120111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706706703670.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 2120120111001 its reverse (1001110210212), we get a palindrome (3121230321213).

The spelling of 2120120111001 in words is "two trillion, one hundred twenty billion, one hundred twenty million, one hundred eleven thousand, one".