2111021102121 has 4 divisors (see below), whose sum is σ = 2814694802832. Its totient is φ = 1407347401412.

The previous prime is 2111021102119. The next prime is 2111021102231. The reversal of 2111021102121 is 1212011201112.

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 2111021102121 - 2¹ = 2111021102119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2111021102121.

It is not an unprimeable number, because it can be changed into a prime (2111021102921) 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, 351836850351 + ... + 351836850356.

It is an arithmetic number, because the mean of its divisors is an integer number (703673700708).

Almost surely, 2^{2111021102121} is an apocalyptic number.

It is an amenable number.

2111021102121 is a deficient number, since it is larger than the sum of its proper divisors (703673700711).

2111021102121 is an equidigital number, since it uses as much as digits as its factorization.

2111021102121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703673700710.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 2111021102121 its reverse (1212011201112), we get a palindrome (3323032303233).

The spelling of 2111021102121 in words is "two trillion, one hundred eleven billion, twenty-one million, one hundred two thousand, one hundred twenty-one".