1203231311131 has 4 divisors (see below), whose sum is σ = 1204138042912. Its totient is φ = 1202324579352.

The previous prime is 1203231311099. The next prime is 1203231311197. The reversal of 1203231311131 is 1311131323021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1203231311131 - 2⁵ = 1203231311099 is a prime.

It is a super-2 number, since 2×1203231311131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1203231411131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453363900 + ... + 453366553.

It is an arithmetic number, because the mean of its divisors is an integer number (301034510728).

Almost surely, 2^{1203231311131} is an apocalyptic number.

1203231311131 is a deficient number, since it is larger than the sum of its proper divisors (906731781).

1203231311131 is an equidigital number, since it uses as much as digits as its factorization.

1203231311131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906731780.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 1203231311131 its reverse (1311131323021), we get a palindrome (2514362634152).

The spelling of 1203231311131 in words is "one trillion, two hundred three billion, two hundred thirty-one million, three hundred eleven thousand, one hundred thirty-one".