111010121 has 12 divisors (see below), whose sum is σ = 116813508. Its totient is φ = 105482784.

The previous prime is 111010117. The next prime is 111010127. The reversal of 111010121 is 121010111.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 49857721 + 61152400 = 7061^2 + 7820^2 .

It is not a de Polignac number, because 111010121 - 2² = 111010117 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 = 111010099 and 111010108.

It is not an unprimeable number, because it can be changed into a prime (111010127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90911 + ... + 92123.

It is an arithmetic number, because the mean of its divisors is an integer number (9734459).

Almost surely, 2^111010121 is an apocalyptic number.

It is an amenable number.

111010121 is a deficient number, since it is larger than the sum of its proper divisors (5803387).

111010121 is a wasteful number, since it uses less digits than its factorization.

111010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1432 (or 1409 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 8.

The square root of 111010121 is about 10536.1340633080. The cubic root of 111010121 is about 480.6041596740.

Adding to 111010121 its reverse (121010111), we get a palindrome (232020232).

The spelling of 111010121 in words is "one hundred eleven million, ten thousand, one hundred twenty-one".