1203311231 has 2 divisors, whose sum is σ = 1203311232. Its totient is φ = 1203311230.

The previous prime is 1203311201. The next prime is 1203311233. The reversal of 1203311231 is 1321133021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1203311231 - 2¹⁴ = 1203294847 is a prime.

It is a super-2 number, since 2×1203311231² = 2895915837301470722, which contains 22 as substring.

Together with 1203311233, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1203311233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601655615 + 601655616.

It is an arithmetic number, because the mean of its divisors is an integer number (601655616).

Almost surely, 2^1203311231 is an apocalyptic number.

1203311231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203311231 is an equidigital number, since it uses as much as digits as its factorization.

1203311231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1203311231 is about 34688.7767296571. The cubic root of 1203311231 is about 1063.6350904296.

Adding to 1203311231 its reverse (1321133021), we get a palindrome (2524444252).

The spelling of 1203311231 in words is "one billion, two hundred three million, three hundred eleven thousand, two hundred thirty-one".