2111102121 has 4 divisors (see below), whose sum is σ = 2814802832. Its totient is φ = 1407401412.

The previous prime is 2111102117. The next prime is 2111102131. The reversal of 2111102121 is 1212011112.

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 not a de Polignac number, because 2111102121 - 2² = 2111102117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111102097 and 2111102106.

It is not an unprimeable number, because it can be changed into a prime (2111102131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 351850351 + ... + 351850356.

It is an arithmetic number, because the mean of its divisors is an integer number (703700708).

Almost surely, 2^2111102121 is an apocalyptic number.

It is an amenable number.

2111102121 is a deficient number, since it is larger than the sum of its proper divisors (703700711).

2111102121 is an equidigital number, since it uses as much as digits as its factorization.

2111102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703700710.

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

The square root of 2111102121 is about 45946.7313418485. The cubic root of 2111102121 is about 1282.8318894518.

Adding to 2111102121 its reverse (1212011112), we get a palindrome (3323113233).

The spelling of 2111102121 in words is "two billion, one hundred eleven million, one hundred two thousand, one hundred twenty-one".