1200131001 has 24 divisors (see below), whose sum is σ = 1806980864. Its totient is φ = 766830240.

The previous prime is 1200130979. The next prime is 1200131003. The reversal of 1200131001 is 1001310021.

It is not a de Polignac number, because 1200131001 - 2⁵ = 1200130969 is a prime.

It is a super-2 number, since 2×1200131001² = 2880628839122524002, which contains 22 as substring.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200131003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4585 + ... + 49206.

Almost surely, 2^1200131001 is an apocalyptic number.

It is an amenable number.

1200131001 is a deficient number, since it is larger than the sum of its proper divisors (606849863).

1200131001 is a wasteful number, since it uses less digits than its factorization.

1200131001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53901 (or 53898 counting only the distinct ones).

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

The square root of 1200131001 is about 34642.9069363412. The cubic root of 1200131001 is about 1062.6972370353.

Adding to 1200131001 its reverse (1001310021), we get a palindrome (2201441022).

It can be divided in two parts, 1 and 200131001, that added together give a palindrome (200131002).

The spelling of 1200131001 in words is "one billion, two hundred million, one hundred thirty-one thousand, one".