2120021110211 has 4 divisors (see below), whose sum is σ = 2122584619032. Its totient is φ = 2117457601392.

The previous prime is 2120021110147. The next prime is 2120021110243. The reversal of 2120021110211 is 1120111200212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2120021110211 - 2⁶ = 2120021110147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2120021710211) 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, 1281753170 + ... + 1281754823.

It is an arithmetic number, because the mean of its divisors is an integer number (530646154758).

Almost surely, 2^{2120021110211} is an apocalyptic number.

2120021110211 is a deficient number, since it is larger than the sum of its proper divisors (2563508821).

2120021110211 is an equidigital number, since it uses as much as digits as its factorization.

2120021110211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2563508820.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2120021110211 its reverse (1120111200212), we get a palindrome (3240132310423).

Subtracting from 2120021110211 its reverse (1120111200212), we obtain a palindrome (999909909999).

The spelling of 2120021110211 in words is "two trillion, one hundred twenty billion, twenty-one million, one hundred ten thousand, two hundred eleven".