1213423271 has 2 divisors, whose sum is σ = 1213423272. Its totient is φ = 1213423270.

The previous prime is 1213423247. The next prime is 1213423291. The reversal of 1213423271 is 1723243121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213423271 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1213423271.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213423291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606711635 + 606711636.

It is an arithmetic number, because the mean of its divisors is an integer number (606711636).

Almost surely, 2^1213423271 is an apocalyptic number.

1213423271 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213423271 is an equidigital number, since it uses as much as digits as its factorization.

1213423271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 26.

The square root of 1213423271 is about 34834.2255691152. The cubic root of 1213423271 is about 1066.6062066100.

Adding to 1213423271 its reverse (1723243121), we get a palindrome (2936666392).

The spelling of 1213423271 in words is "one billion, two hundred thirteen million, four hundred twenty-three thousand, two hundred seventy-one".