1121200001 has 8 divisors (see below), whose sum is σ = 1181747880. Its totient is φ = 1062111232.

The previous prime is 1121199991. The next prime is 1121200007. The reversal of 1121200001 is 1000021211.

It can be written as a sum of positive squares in 4 ways, for example, as 447745600 + 673454401 = 21160^2 + 25951^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121200001 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 363200 + ... + 366273.

It is an arithmetic number, because the mean of its divisors is an integer number (147718485).

Almost surely, 2^1121200001 is an apocalyptic number.

It is an amenable number.

1121200001 is a deficient number, since it is larger than the sum of its proper divisors (60547879).

1121200001 is an equidigital number, since it uses as much as digits as its factorization.

1121200001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729555.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1121200001 is about 33484.3247057485. The cubic root of 1121200001 is about 1038.8695807321.

Adding to 1121200001 its reverse (1000021211), we get a palindrome (2121221212).

The spelling of 1121200001 in words is "one billion, one hundred twenty-one million, two hundred thousand, one".