1231012567 has 2 divisors, whose sum is σ = 1231012568. Its totient is φ = 1231012566.

The previous prime is 1231012529. The next prime is 1231012589. The reversal of 1231012567 is 7652101321.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1231012567 - 2¹¹ = 1231010519 is a prime.

It is a super-2 number, since 2×1231012567² = 3030783880223858978, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231012597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615506283 + 615506284.

It is an arithmetic number, because the mean of its divisors is an integer number (615506284).

Almost surely, 2^1231012567 is an apocalyptic number.

1231012567 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231012567 is an equidigital number, since it uses as much as digits as its factorization.

1231012567 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 1231012567 is about 35085.7886757587. The cubic root of 1231012567 is about 1071.7352015338.

Adding to 1231012567 its reverse (7652101321), we get a palindrome (8883113888).

The spelling of 1231012567 in words is "one billion, two hundred thirty-one million, twelve thousand, five hundred sixty-seven".