111101112110021 has 64 divisors (see below), whose sum is σ = 129147692544000. Its totient is φ = 94517280000000.

The previous prime is 111101112110017. The next prime is 111101112110057. The reversal of 111101112110021 is 120011211101111.

It is not a de Polignac number, because 111101112110021 - 2² = 111101112110017 is a prime.

It is a super-2 number, since 2×111101112110021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111101112109978 and 111101112110005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111101112116021) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13069177271 + ... + 13069185771.

It is an arithmetic number, because the mean of its divisors is an integer number (2017932696000).

Almost surely, 2^{111101112110021} is an apocalyptic number.

111101112110021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111101112110021 is a deficient number, since it is larger than the sum of its proper divisors (18046580433979).

111101112110021 is a wasteful number, since it uses less digits than its factorization.

111101112110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10962.

The product of its (nonzero) digits is 4, while the sum is 14.

Adding to 111101112110021 its reverse (120011211101111), we get a palindrome (231112323211132).

The spelling of 111101112110021 in words is "one hundred eleven trillion, one hundred one billion, one hundred twelve million, one hundred ten thousand, twenty-one".