1131121201 has 8 divisors (see below), whose sum is σ = 1292941440. Its totient is φ = 969358848.

The previous prime is 1131121193. The next prime is 1131121207. The reversal of 1131121201 is 1021211311.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1131121201 - 2³ = 1131121193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1131121207) 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, 42225 + ... + 63601.

It is an arithmetic number, because the mean of its divisors is an integer number (161617680).

Almost surely, 2^1131121201 is an apocalyptic number.

It is an amenable number.

1131121201 is a deficient number, since it is larger than the sum of its proper divisors (161820239).

1131121201 is an equidigital number, since it uses as much as digits as its factorization.

1131121201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28943.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1131121201 is about 33632.1453523262. The cubic root of 1131121201 is about 1041.9248134122.

Adding to 1131121201 its reverse (1021211311), we get a palindrome (2152332512).

The spelling of 1131121201 in words is "one billion, one hundred thirty-one million, one hundred twenty-one thousand, two hundred one".