1121002101 has 12 divisors (see below), whose sum is σ = 1625947180. Its totient is φ = 744232320.

The previous prime is 1121002097. The next prime is 1121002121. The reversal of 1121002101 is 1012001211.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 883872900 + 237129201 = 29730^2 + 15399^2 .

It is not a de Polignac number, because 1121002101 - 2² = 1121002097 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 a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121002121) 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 11 ways as a sum of consecutive naturals, for example, 256246 + ... + 260583.

Almost surely, 2^1121002101 is an apocalyptic number.

It is an amenable number.

1121002101 is a deficient number, since it is larger than the sum of its proper divisors (504945079).

1121002101 is a wasteful number, since it uses less digits than its factorization.

1121002101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517076 (or 517073 counting only the distinct ones).

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

The square root of 1121002101 is about 33481.3694612392. The cubic root of 1121002101 is about 1038.8084544427.

Adding to 1121002101 its reverse (1012001211), we get a palindrome (2133003312).

The spelling of 1121002101 in words is "one billion, one hundred twenty-one million, two thousand, one hundred one".