1231231111203 has 32 divisors (see below), whose sum is σ = 1691698567680. Its totient is φ = 795945934080.

The previous prime is 1231231111169. The next prime is 1231231111219. The reversal of 1231231111203 is 3021111321321.

It is not a de Polignac number, because 1231231111203 - 2⁶ = 1231231111139 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1231231111203.

It is not an unprimeable number, because it can be changed into a prime (1231231111283) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46133023 + ... + 46159703.

It is an arithmetic number, because the mean of its divisors is an integer number (52865580240).

Almost surely, 2^{1231231111203} is an apocalyptic number.

1231231111203 is a deficient number, since it is larger than the sum of its proper divisors (460467456477).

1231231111203 is a wasteful number, since it uses less digits than its factorization.

1231231111203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28107.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1231231111203 its reverse (3021111321321), we get a palindrome (4252342432524).

The spelling of 1231231111203 in words is "one trillion, two hundred thirty-one billion, two hundred thirty-one million, one hundred eleven thousand, two hundred three".