1231211203 has 8 divisors (see below), whose sum is σ = 1245155072. Its totient is φ = 1217293056.

The previous prime is 1231211171. The next prime is 1231211207. The reversal of 1231211203 is 3021121321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1231211203 - 2⁵ = 1231211171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231211207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99601 + ... + 111277.

It is an arithmetic number, because the mean of its divisors is an integer number (155644384).

Almost surely, 2^1231211203 is an apocalyptic number.

1231211203 is a deficient number, since it is larger than the sum of its proper divisors (13943869).

1231211203 is a wasteful number, since it uses less digits than its factorization.

1231211203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12861.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1231211203 is about 35088.6192803308. The cubic root of 1231211203 is about 1071.7928434431.

Adding to 1231211203 its reverse (3021121321), we get a palindrome (4252332524).

The spelling of 1231211203 in words is "one billion, two hundred thirty-one million, two hundred eleven thousand, two hundred three".