1221122167 has 2 divisors, whose sum is σ = 1221122168. Its totient is φ = 1221122166.

The previous prime is 1221122159. The next prime is 1221122179. The reversal of 1221122167 is 7612211221.

It is a weak prime.

It is an emirp because it is prime and its reverse (7612211221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1221122167 - 2³ = 1221122159 is a prime.

It is a super-2 number, since 2×1221122167² = 2982278693477551778, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221122867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610561083 + 610561084.

It is an arithmetic number, because the mean of its divisors is an integer number (610561084).

Almost surely, 2^1221122167 is an apocalyptic number.

1221122167 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221122167 is an equidigital number, since it uses as much as digits as its factorization.

1221122167 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 25.

The square root of 1221122167 is about 34944.5584748184. The cubic root of 1221122167 is about 1068.8572441793.

Adding to 1221122167 its reverse (7612211221), we get a palindrome (8833333388).

The spelling of 1221122167 in words is "one billion, two hundred twenty-one million, one hundred twenty-two thousand, one hundred sixty-seven".