1121002011 has 24 divisors (see below), whose sum is σ = 1685274864. Its totient is φ = 744629760.

The previous prime is 1121001907. The next prime is 1121002039. The reversal of 1121002011 is 1102001211.

It is a happy number.

It is not a de Polignac number, because 1121002011 - 2¹¹ = 1120999963 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 1121001984 and 1121002002.

It is not an unprimeable number, because it can be changed into a prime (1121000011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60075 + ... + 76491.

It is an arithmetic number, because the mean of its divisors is an integer number (70219786).

Almost surely, 2^1121002011 is an apocalyptic number.

1121002011 is a deficient number, since it is larger than the sum of its proper divisors (564272853).

1121002011 is an equidigital number, since it uses as much as digits as its factorization.

1121002011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16713 (or 16701 counting only the distinct ones).

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

The square root of 1121002011 is about 33481.3681172081. The cubic root of 1121002011 is about 1038.8084266423.

Adding to 1121002011 its reverse (1102001211), we get a palindrome (2223003222).

The spelling of 1121002011 in words is "one billion, one hundred twenty-one million, two thousand, eleven".