111030312121 has 16 divisors (see below), whose sum is σ = 113515855488. Its totient is φ = 108576576000.

The previous prime is 111030312119. The next prime is 111030312143. The reversal of 111030312121 is 121213030111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 111030312121 - 2¹ = 111030312119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111030312095 and 111030312104.

It is not an unprimeable number, because it can be changed into a prime (111030312221) 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, 4916626 + ... + 4939156.

It is an arithmetic number, because the mean of its divisors is an integer number (7094740968).

Almost surely, 2^111030312121 is an apocalyptic number.

It is an amenable number.

111030312121 is a deficient number, since it is larger than the sum of its proper divisors (2485543367).

111030312121 is a wasteful number, since it uses less digits than its factorization.

111030312121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23232.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 111030312121 its reverse (121213030111), we get a palindrome (232243342232).

The spelling of 111030312121 in words is "one hundred eleven billion, thirty million, three hundred twelve thousand, one hundred twenty-one".