1231213403 has 8 divisors (see below), whose sum is σ = 1408363008. Its totient is φ = 1054379304.

The previous prime is 1231213393. The next prime is 1231213411. The reversal of 1231213403 is 3043121321.

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 1231213403 - 2⁴ = 1231213387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231213103) 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, 70451 + ... + 86172.

It is an arithmetic number, because the mean of its divisors is an integer number (176045376).

Almost surely, 2^1231213403 is an apocalyptic number.

1231213403 is a deficient number, since it is larger than the sum of its proper divisors (177149605).

1231213403 is a wasteful number, since it uses less digits than its factorization.

1231213403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157753.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1231213403 is about 35088.6506295127. The cubic root of 1231213403 is about 1071.7934818234.

Adding to 1231213403 its reverse (3043121321), we get a palindrome (4274334724).

The spelling of 1231213403 in words is "one billion, two hundred thirty-one million, two hundred thirteen thousand, four hundred three".