1121200002 has 64 divisors (see below), whose sum is σ = 2769822720. Its totient is φ = 333849600.

The previous prime is 1121199991. The next prime is 1121200007. The reversal of 1121200002 is 2000021211.

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

It is not an unprimeable number, because it can be changed into a prime (1121200007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3999 + ... + 47522.

It is an arithmetic number, because the mean of its divisors is an integer number (43278480).

Almost surely, 2^1121200002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1121200002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1384911360).

1121200002 is an abundant number, since it is smaller than the sum of its proper divisors (1648622718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1121200002 is a wasteful number, since it uses less digits than its factorization.

1121200002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51576 (or 51570 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1121200002 is about 33484.3247206809. The cubic root of 1121200002 is about 1038.8695810410.

Adding to 1121200002 its reverse (2000021211), we get a palindrome (3121221213).

The spelling of 1121200002 in words is "one billion, one hundred twenty-one million, two hundred thousand, two".