1231355201 has 16 divisors (see below), whose sum is σ = 1277347968. Its totient is φ = 1186348800.

The previous prime is 1231355179. The next prime is 1231355263. The reversal of 1231355201 is 1025531321.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1231355201 - 2⁶ = 1231355137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231355291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1267646 + ... + 1268616.

It is an arithmetic number, because the mean of its divisors is an integer number (79834248).

Almost surely, 2^1231355201 is an apocalyptic number.

It is an amenable number.

1231355201 is a deficient number, since it is larger than the sum of its proper divisors (45992767).

1231355201 is an equidigital number, since it uses as much as digits as its factorization.

1231355201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1432.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1231355201 is about 35090.6711392074. The cubic root of 1231355201 is about 1071.8346261497.

Adding to 1231355201 its reverse (1025531321), we get a palindrome (2256886522).

The spelling of 1231355201 in words is "one billion, two hundred thirty-one million, three hundred fifty-five thousand, two hundred one".