1231010001 has 32 divisors (see below), whose sum is σ = 2079544320. Its totient is φ = 712979712.

The previous prime is 1231009991. The next prime is 1231010003. The reversal of 1231010001 is 1000101321.

It is not a de Polignac number, because 1231010001 - 2⁷ = 1231009873 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 (1231010003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97185 + ... + 109118.

It is an arithmetic number, because the mean of its divisors is an integer number (64985760).

Almost surely, 2^1231010001 is an apocalyptic number.

It is an amenable number.

1231010001 is a deficient number, since it is larger than the sum of its proper divisors (848534319).

1231010001 is a wasteful number, since it uses less digits than its factorization.

1231010001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206342 (or 206336 counting only the distinct ones).

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

The square root of 1231010001 is about 35085.7521082276. The cubic root of 1231010001 is about 1071.7344568692.

Adding to 1231010001 its reverse (1000101321), we get a palindrome (2231111322).

The spelling of 1231010001 in words is "one billion, two hundred thirty-one million, ten thousand, one".