1110002121 has 12 divisors (see below), whose sum is σ = 1607639748. Its totient is φ = 738015264.

The previous prime is 1110002111. The next prime is 1110002147. The reversal of 1110002121 is 1212000111.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 614494521 + 495507600 = 24789^2 + 22260^2 .

It is not a de Polignac number, because 1110002121 - 2⁷ = 1110001993 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1110002111) 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, 161970 + ... + 168683.

It is an arithmetic number, because the mean of its divisors is an integer number (133969979).

Almost surely, 2^1110002121 is an apocalyptic number.

It is an amenable number.

1110002121 is a deficient number, since it is larger than the sum of its proper divisors (497637627).

1110002121 is a wasteful number, since it uses less digits than its factorization.

1110002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331032 (or 331029 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1110002121 is about 33316.6943288196. The cubic root of 1110002121 is about 1035.3994649317.

Adding to 1110002121 its reverse (1212000111), we get a palindrome (2322002232).

The spelling of 1110002121 in words is "one billion, one hundred ten million, two thousand, one hundred twenty-one".