1222111109971 has 2 divisors, whose sum is σ = 1222111109972. Its totient is φ = 1222111109970.

The previous prime is 1222111109969. The next prime is 1222111110029. The reversal of 1222111109971 is 1799011112221.

It is a weak prime.

It is an emirp because it is prime and its reverse (1799011112221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1222111109971 - 2¹ = 1222111109969 is a prime.

It is a super-2 number, since 2×1222111109971² (a number of 25 digits) contains 22 as substring.

Together with 1222111109969, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1222111109971.

It is not a weakly prime, because it can be changed into another prime (1222111109171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611055554985 + 611055554986.

It is an arithmetic number, because the mean of its divisors is an integer number (611055554986).

Almost surely, 2^{1222111109971} is an apocalyptic number.

1222111109971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222111109971 is an equidigital number, since it uses as much as digits as its factorization.

1222111109971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 37.

The spelling of 1222111109971 in words is "one trillion, two hundred twenty-two billion, one hundred eleven million, one hundred nine thousand, nine hundred seventy-one".