1212667271 has 2 divisors, whose sum is σ = 1212667272. Its totient is φ = 1212667270.

The previous prime is 1212667243. The next prime is 1212667279. The reversal of 1212667271 is 1727662121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212667271 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212667279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606333635 + 606333636.

It is an arithmetic number, because the mean of its divisors is an integer number (606333636).

Almost surely, 2^1212667271 is an apocalyptic number.

1212667271 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212667271 is an equidigital number, since it uses as much as digits as its factorization.

1212667271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 35.

The square root of 1212667271 is about 34823.3724817112. The cubic root of 1212667271 is about 1066.3846511065.

It can be divided in two parts, 12126 and 67271, that added together give a palindrome (79397).

The spelling of 1212667271 in words is "one billion, two hundred twelve million, six hundred sixty-seven thousand, two hundred seventy-one".