1220112431171 has 2 divisors, whose sum is σ = 1220112431172. Its totient is φ = 1220112431170.

The previous prime is 1220112431141. The next prime is 1220112431173. The reversal of 1220112431171 is 1711342110221.

It is a strong prime.

It is an emirp because it is prime and its reverse (1711342110221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220112431171 is a prime.

It is a Sophie Germain prime.

Together with 1220112431173, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1220112431171.

It is not a weakly prime, because it can be changed into another prime (1220112431173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610056215585 + 610056215586.

It is an arithmetic number, because the mean of its divisors is an integer number (610056215586).

Almost surely, 2^{1220112431171} is an apocalyptic number.

1220112431171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220112431171 is an equidigital number, since it uses as much as digits as its factorization.

1220112431171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 26.

Adding to 1220112431171 its reverse (1711342110221), we get a palindrome (2931454541392).

The spelling of 1220112431171 in words is "one trillion, two hundred twenty billion, one hundred twelve million, four hundred thirty-one thousand, one hundred seventy-one".