1321231283 has 2 divisors, whose sum is σ = 1321231284. Its totient is φ = 1321231282.

The previous prime is 1321231243. The next prime is 1321231321. The reversal of 1321231283 is 3821321231.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321231283 is a prime.

It is not a weakly prime, because it can be changed into another prime (1321231243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660615641 + 660615642.

It is an arithmetic number, because the mean of its divisors is an integer number (660615642).

Almost surely, 2^1321231283 is an apocalyptic number.

1321231283 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321231283 is an equidigital number, since it uses as much as digits as its factorization.

1321231283 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 26.

The square root of 1321231283 is about 36348.7452740806. The cubic root of 1321231283 is about 1097.3022827256.

The spelling of 1321231283 in words is "one billion, three hundred twenty-one million, two hundred thirty-one thousand, two hundred eighty-three".