1321112747 has 2 divisors, whose sum is σ = 1321112748. Its totient is φ = 1321112746.

The previous prime is 1321112671. The next prime is 1321112753. The reversal of 1321112747 is 7472111231.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321112747 is a prime.

It is not a weakly prime, because it can be changed into another prime (1321112797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660556373 + 660556374.

It is an arithmetic number, because the mean of its divisors is an integer number (660556374).

Almost surely, 2^1321112747 is an apocalyptic number.

1321112747 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321112747 is an equidigital number, since it uses as much as digits as its factorization.

1321112747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2352, while the sum is 29.

The square root of 1321112747 is about 36347.1146997943. The cubic root of 1321112747 is about 1097.2694664390.

Adding to 1321112747 its reverse (7472111231), we get a palindrome (8793223978).

The spelling of 1321112747 in words is "one billion, three hundred twenty-one million, one hundred twelve thousand, seven hundred forty-seven".