1131002001 has 16 divisors (see below), whose sum is σ = 1733337600. Its totient is φ = 728000784.

The previous prime is 1131001981. The next prime is 1131002003. The reversal of 1131002001 is 1002001311.

It is not a de Polignac number, because 1131002001 - 2⁷ = 1131001873 is a prime.

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 (1131002003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 721441 + ... + 723006.

It is an arithmetic number, because the mean of its divisors is an integer number (108333600).

Almost surely, 2^1131002001 is an apocalyptic number.

It is an amenable number.

1131002001 is a deficient number, since it is larger than the sum of its proper divisors (602335599).

1131002001 is a wasteful number, since it uses less digits than its factorization.

1131002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444485 (or 1444479 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 1131002001 is about 33630.3731915065. The cubic root of 1131002001 is about 1041.8882120293. Note that the first 3 decimals are identical.

Adding to 1131002001 its reverse (1002001311), we get a palindrome (2133003312).

The spelling of 1131002001 in words is "one billion, one hundred thirty-one million, two thousand, one".