111120100100021 has 4 divisors (see below), whose sum is σ = 113003491627200. Its totient is φ = 109236708572844.

The previous prime is 111120100099783. The next prime is 111120100100047. The reversal of 111120100100021 is 120001001021111.

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 not a de Polignac number, because 111120100100021 - 2²⁶ = 111120032991157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111120100099975 and 111120100100011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111120100106021) 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, 941695763501 + ... + 941695763618.

It is an arithmetic number, because the mean of its divisors is an integer number (28250872906800).

Almost surely, 2^{111120100100021} is an apocalyptic number.

It is an amenable number.

111120100100021 is a deficient number, since it is larger than the sum of its proper divisors (1883391527179).

111120100100021 is an equidigital number, since it uses as much as digits as its factorization.

111120100100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1883391527178.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 111120100100021 its reverse (120001001021111), we get a palindrome (231121101121132).

The spelling of 111120100100021 in words is "one hundred eleven trillion, one hundred twenty billion, one hundred million, one hundred thousand, twenty-one".