2101110120121 has 4 divisors (see below), whose sum is σ = 2101170763152. Its totient is φ = 2101049477092.

The previous prime is 2101110120089. The next prime is 2101110120191. The reversal of 2101110120121 is 1210210111012.

It is a happy number.

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 cyclic number.

It is not a de Polignac number, because 2101110120121 - 2⁵ = 2101110120089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101110120191) 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, 30269515 + ... + 30338848.

It is an arithmetic number, because the mean of its divisors is an integer number (525292690788).

Almost surely, 2^{2101110120121} is an apocalyptic number.

It is an amenable number.

2101110120121 is a deficient number, since it is larger than the sum of its proper divisors (60643031).

2101110120121 is an equidigital number, since it uses as much as digits as its factorization.

2101110120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60643030.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 2101110120121 its reverse (1210210111012), we get a palindrome (3311320231133).

The spelling of 2101110120121 in words is "two trillion, one hundred one billion, one hundred ten million, one hundred twenty thousand, one hundred twenty-one".