2111021112021 has 32 divisors (see below), whose sum is σ = 2931925455360. Its totient is φ = 1349417651904.

The previous prime is 2111021111989. The next prime is 2111021112107. The reversal of 2111021112021 is 1202111201112.

It is a happy number.

It is not a de Polignac number, because 2111021112021 - 2⁵ = 2111021111989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111021110021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18136210 + ... + 18252236.

It is an arithmetic number, because the mean of its divisors is an integer number (91622670480).

Almost surely, 2^{2111021112021} is an apocalyptic number.

It is an amenable number.

2111021112021 is a deficient number, since it is larger than the sum of its proper divisors (820904343339).

2111021112021 is a wasteful number, since it uses less digits than its factorization.

2111021112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117505.

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

Adding to 2111021112021 its reverse (1202111201112), we get a palindrome (3313132313133).

The spelling of 2111021112021 in words is "two trillion, one hundred eleven billion, twenty-one million, one hundred twelve thousand, twenty-one".