1231000201 has 4 divisors (see below), whose sum is σ = 1248338304. Its totient is φ = 1213662100.

The previous prime is 1231000193. The next prime is 1231000229. The reversal of 1231000201 is 1020001321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1231000201 - 2³ = 1231000193 is a prime.

It is a super-2 number, since 2×1231000201² = 3030722989724080802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231000231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8668945 + ... + 8669086.

It is an arithmetic number, because the mean of its divisors is an integer number (312084576).

Almost surely, 2^1231000201 is an apocalyptic number.

It is an amenable number.

1231000201 is a deficient number, since it is larger than the sum of its proper divisors (17338103).

1231000201 is an equidigital number, since it uses as much as digits as its factorization.

1231000201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17338102.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1231000201 is about 35085.6124501198. The cubic root of 1231000201 is about 1071.7316128562.

Adding to 1231000201 its reverse (1020001321), we get a palindrome (2251001522).

The spelling of 1231000201 in words is "one billion, two hundred thirty-one million, two hundred one", and thus it is an aban number.