111011122100021 has 8 divisors (see below), whose sum is σ = 130418660928864. Its totient is φ = 93156186377520.

The previous prime is 111011122099981. The next prime is 111011122100033. The reversal of 111011122100021 is 120001221110111.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111011122100021 is a prime.

It is a super-3 number, since 3×111011122100021³ (a number of 43 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111011122099969 and 111011122100005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111011122100621) 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, 388150776431 + ... + 388150776716.

It is an arithmetic number, because the mean of its divisors is an integer number (16302332616108).

Almost surely, 2^{111011122100021} is an apocalyptic number.

111011122100021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111011122100021 is a deficient number, since it is larger than the sum of its proper divisors (19407538828843).

111011122100021 is a wasteful number, since it uses less digits than its factorization.

111011122100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776301553171.

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

Adding to 111011122100021 its reverse (120001221110111), we get a palindrome (231012343210132).

The spelling of 111011122100021 in words is "one hundred eleven trillion, eleven billion, one hundred twenty-two million, one hundred thousand, twenty-one".