21112111121113 has 8 divisors (see below), whose sum is σ = 22030091603136. Its totient is φ = 20194135856400.

The previous prime is 21112111121089. The next prime is 21112111121137. The reversal of 21112111121113 is 31112111121112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21112111121089) and next prime (21112111121137).

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

It is not a de Polignac number, because 21112111121113 - 2⁵ = 21112111121081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21112111121183) 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, 8548318 + ... + 10737688.

It is an arithmetic number, because the mean of its divisors is an integer number (2753761450392).

Almost surely, 2^{21112111121113} is an apocalyptic number.

21112111121113 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21112111121113 is a deficient number, since it is larger than the sum of its proper divisors (917980482023).

21112111121113 is a wasteful number, since it uses less digits than its factorization.

21112111121113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2608655.

The product of its digits is 24, while the sum is 19.

Adding to 21112111121113 its reverse (31112111121112), we get a palindrome (52224222242225).

Subtracting 21112111121113 from its reverse (31112111121112), we obtain a palindrome (9999999999999).

The spelling of 21112111121113 in words is "twenty-one trillion, one hundred twelve billion, one hundred eleven million, one hundred twenty-one thousand, one hundred thirteen".