111102121100021 has 8 divisors (see below), whose sum is σ = 111426049122144. Its totient is φ = 110778214624560.

The previous prime is 111102121099969. The next prime is 111102121100039. The reversal of 111102121100021 is 120001121201111.

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 111102121100021 - 2²⁶ = 111102053991157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 111102121099969 and 111102121100005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111102121100221) 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, 4970051 + ... + 15713231.

It is an arithmetic number, because the mean of its divisors is an integer number (13928256140268).

Almost surely, 2^{111102121100021} is an apocalyptic number.

It is an amenable number.

111102121100021 is a deficient number, since it is larger than the sum of its proper divisors (323928022123).

111102121100021 is a wasteful number, since it uses less digits than its factorization.

111102121100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10773331.

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

Adding to 111102121100021 its reverse (120001121201111), we get a palindrome (231103242301132).

The spelling of 111102121100021 in words is "one hundred eleven trillion, one hundred two billion, one hundred twenty-one million, one hundred thousand, twenty-one".