12221221127 has 2 divisors, whose sum is σ = 12221221128. Its totient is φ = 12221221126.

The previous prime is 12221221121. The next prime is 12221221139. The reversal of 12221221127 is 72112212221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12221221127 - 2⁶ = 12221221063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12221221121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110610563 + 6110610564.

It is an arithmetic number, because the mean of its divisors is an integer number (6110610564).

Almost surely, 2^12221221127 is an apocalyptic number.

12221221127 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221221127 is an equidigital number, since it uses as much as digits as its factorization.

12221221127 is an evil number, because the sum of its binary digits is even.

The product of its digits is 448, while the sum is 23.

Adding to 12221221127 its reverse (72112212221), we get a palindrome (84333433348).

The spelling of 12221221127 in words is "twelve billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred twenty-seven".