1111010121 has 16 divisors (see below), whose sum is σ = 1772552320. Its totient is φ = 683698320.

The previous prime is 1111010113. The next prime is 1111010149. The reversal of 1111010121 is 1210101111.

It is not a de Polignac number, because 1111010121 - 2³ = 1111010113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111010191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1582285 + ... + 1582986.

It is an arithmetic number, because the mean of its divisors is an integer number (110784520).

Almost surely, 2^1111010121 is an apocalyptic number.

It is an amenable number.

1111010121 is a deficient number, since it is larger than the sum of its proper divisors (661542199).

1111010121 is a wasteful number, since it uses less digits than its factorization.

1111010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3165293 (or 3165287 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

The square root of 1111010121 is about 33331.8184472435. The cubic root of 1111010121 is about 1035.7127877249.

Adding to 1111010121 its reverse (1210101111), we get a palindrome (2321111232).

The spelling of 1111010121 in words is "one billion, one hundred eleven million, ten thousand, one hundred twenty-one".