2111110021021 has 8 divisors (see below), whose sum is σ = 2235359652480. Its totient is φ = 1986867799488.

The previous prime is 2111110021001. The next prime is 2111110021039. The reversal of 2111110021021 is 1201200111112.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2111110021021 - 2¹⁷ = 2111109889949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111110020992 and 2111110021010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111110021001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1260501 + ... + 2410618.

It is an arithmetic number, because the mean of its divisors is an integer number (279419956560).

Almost surely, 2^{2111110021021} is an apocalyptic number.

It is an amenable number.

2111110021021 is a deficient number, since it is larger than the sum of its proper divisors (124249631459).

2111110021021 is a wasteful number, since it uses less digits than its factorization.

2111110021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3704963.

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

Adding to 2111110021021 its reverse (1201200111112), we get a palindrome (3312310132133).

Subtracting from 2111110021021 its reverse (1201200111112), we obtain a palindrome (909909909909).

The spelling of 2111110021021 in words is "two trillion, one hundred eleven billion, one hundred ten million, twenty-one thousand, twenty-one".