2111112111021 has 8 divisors (see below), whose sum is σ = 2814868624224. Its totient is φ = 1407381835920.

The previous prime is 2111112111011. The next prime is 2111112111029. The reversal of 2111112111021 is 1201112111112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2111112111021 - 2¹⁵ = 2111112078253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111112111029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6371011 + ... + 6694176.

It is an arithmetic number, because the mean of its divisors is an integer number (351858578028).

Almost surely, 2^{2111112111021} is an apocalyptic number.

It is an amenable number.

2111112111021 is a deficient number, since it is larger than the sum of its proper divisors (703756513203).

2111112111021 is a wasteful number, since it uses less digits than its factorization.

2111112111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13119051.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 2111112111021 its reverse (1201112111112), we get a palindrome (3312224222133).

Subtracting from 2111112111021 its reverse (1201112111112), we obtain a palindrome (909999999909).

The spelling of 2111112111021 in words is "two trillion, one hundred eleven billion, one hundred twelve million, one hundred eleven thousand, twenty-one".