203123031131231 has 2 divisors, whose sum is σ = 203123031131232. Its totient is φ = 203123031131230.

The previous prime is 203123031131123. The next prime is 203123031131327. The reversal of 203123031131231 is 132131130321302.

Together with previous prime (203123031131123) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 203123031131231 - 2³⁴ = 203105851262047 is a prime.

It is a super-2 number, since 2×203123031131231² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 203123031131231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203123031191231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101561515565615 + 101561515565616.

It is an arithmetic number, because the mean of its divisors is an integer number (101561515565616).

Almost surely, 2^{203123031131231} is an apocalyptic number.

203123031131231 is a deficient number, since it is larger than the sum of its proper divisors (1).

203123031131231 is an equidigital number, since it uses as much as digits as its factorization.

203123031131231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 203123031131231 its reverse (132131130321302), we get a palindrome (335254161452533).

The spelling of 203123031131231 in words is "two hundred three trillion, one hundred twenty-three billion, thirty-one million, one hundred thirty-one thousand, two hundred thirty-one".