2101200121011 has 4 divisors (see below), whose sum is σ = 2801600161352. Its totient is φ = 1400800080672.

The previous prime is 2101200121001. The next prime is 2101200121019. The reversal of 2101200121011 is 1101210021012.

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

It is not a de Polignac number, because 2101200121011 - 2⁷ = 2101200120883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101200121019) 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, 350200020166 + ... + 350200020171.

It is an arithmetic number, because the mean of its divisors is an integer number (700400040338).

Almost surely, 2^{2101200121011} is an apocalyptic number.

2101200121011 is a deficient number, since it is larger than the sum of its proper divisors (700400040341).

2101200121011 is an equidigital number, since it uses as much as digits as its factorization.

2101200121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700400040340.

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

Adding to 2101200121011 its reverse (1101210021012), we get a palindrome (3202410142023).

Subtracting from 2101200121011 its reverse (1101210021012), we obtain a palindrome (999990099999).

It can be divided in two parts, 21012001 and 21011, that added together give a palindrome (21033012).

The spelling of 2101200121011 in words is "two trillion, one hundred one billion, two hundred million, one hundred twenty-one thousand, eleven".