1203231001 has 4 divisors (see below), whose sum is σ = 1375121152. Its totient is φ = 1031340852.

The previous prime is 1203230989. The next prime is 1203231011. The reversal of 1203231001 is 1001323021.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1001323021 = 7243 ⋅138247.

It is a cyclic number.

It is not a de Polignac number, because 1203231001 - 2⁵ = 1203230969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1203231011) 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, 85945065 + ... + 85945078.

It is an arithmetic number, because the mean of its divisors is an integer number (343780288).

Almost surely, 2^1203231001 is an apocalyptic number.

It is an amenable number.

1203231001 is a deficient number, since it is larger than the sum of its proper divisors (171890151).

1203231001 is an equidigital number, since it uses as much as digits as its factorization.

1203231001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171890150.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1203231001 is about 34687.6202844761. The cubic root of 1203231001 is about 1063.6114508431.

Adding to 1203231001 its reverse (1001323021), we get a palindrome (2204554022).

The spelling of 1203231001 in words is "one billion, two hundred three million, two hundred thirty-one thousand, one".