111221200002121 has 16 divisors (see below), whose sum is σ = 122648153025600. Its totient is φ = 100015442424000.

The previous prime is 111221200002113. The next prime is 111221200002247. The reversal of 111221200002121 is 121200002122111.

It is a cyclic number.

It is not a de Polignac number, because 111221200002121 - 2³ = 111221200002113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111221200002095 and 111221200002104.

It is not an unprimeable number, because it can be changed into a prime (111221200032121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45636051 + ... + 48011368.

It is an arithmetic number, because the mean of its divisors is an integer number (7665509564100).

Almost surely, 2^{111221200002121} is an apocalyptic number.

111221200002121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111221200002121 is a deficient number, since it is larger than the sum of its proper divisors (11426953023479).

111221200002121 is a wasteful number, since it uses less digits than its factorization.

111221200002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93648600.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 111221200002121 its reverse (121200002122111), we get a palindrome (232421202124232).

The spelling of 111221200002121 in words is "one hundred eleven trillion, two hundred twenty-one billion, two hundred million, two thousand, one hundred twenty-one".