111102012110021 has 4 divisors (see below), whose sum is σ = 111116390532672. Its totient is φ = 111087633687372.

The previous prime is 111102012109993. The next prime is 111102012110041. The reversal of 111102012110021 is 120011210201111.

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 a de Polignac number, because none of the positive numbers 2^k-111102012110021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111102012109978 and 111102012110005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111102012110041) 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, 7189199735 + ... + 7189215188.

It is an arithmetic number, because the mean of its divisors is an integer number (27779097633168).

Almost surely, 2^{111102012110021} is an apocalyptic number.

It is an amenable number.

111102012110021 is a deficient number, since it is larger than the sum of its proper divisors (14378422651).

111102012110021 is an equidigital number, since it uses as much as digits as its factorization.

111102012110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14378422650.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 111102012110021 its reverse (120011210201111), we get a palindrome (231113222311132).

The spelling of 111102012110021 in words is "one hundred eleven trillion, one hundred two billion, twelve million, one hundred ten thousand, twenty-one".