111002122100021 has 8 divisors (see below), whose sum is σ = 111013387303320. Its totient is φ = 110990857449472.

The previous prime is 111002122100017. The next prime is 111002122100071. The reversal of 111002122100021 is 120001221200111.

It can be written as a sum of positive squares in 4 ways, for example, as 728726859025 + 110273395240996 = 853655^2 + 10501114^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 111002122100021 - 2² = 111002122100017 is a prime.

It is a super-2 number, since 2×111002122100021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111002122099969 and 111002122100005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111002122100071) 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, 483822491 + ... + 484051863.

It is an arithmetic number, because the mean of its divisors is an integer number (13876673412915).

Almost surely, 2^{111002122100021} is an apocalyptic number.

It is an amenable number.

111002122100021 is a deficient number, since it is larger than the sum of its proper divisors (11265203299).

111002122100021 is a wasteful number, since it uses less digits than its factorization.

111002122100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276375.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111002122100021 its reverse (120001221200111), we get a palindrome (231003343300132).

The spelling of 111002122100021 in words is "one hundred eleven trillion, two billion, one hundred twenty-two million, one hundred thousand, twenty-one".