1231202201 has 4 divisors (see below), whose sum is σ = 1231276032. Its totient is φ = 1231128372.

The previous prime is 1231202183. The next prime is 1231202257. The reversal of 1231202201 is 1022021321.

It is a happy number.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1231202201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231205201) 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, 1256 + ... + 49638.

It is an arithmetic number, because the mean of its divisors is an integer number (307819008).

Almost surely, 2^1231202201 is an apocalyptic number.

It is an amenable number.

1231202201 is a deficient number, since it is larger than the sum of its proper divisors (73831).

1231202201 is an equidigital number, since it uses as much as digits as its factorization.

1231202201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73830.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1231202201 is about 35088.4910048865. The cubic root of 1231202201 is about 1071.7902312992.

Adding to 1231202201 its reverse (1022021321), we get a palindrome (2253223522).

The spelling of 1231202201 in words is "one billion, two hundred thirty-one million, two hundred two thousand, two hundred one".