222222121871 has 2 divisors, whose sum is σ = 222222121872. Its totient is φ = 222222121870.

The previous prime is 222222121859. The next prime is 222222121879. The reversal of 222222121871 is 178121222222.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222222121871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222222121879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111111060935 + 111111060936.

It is an arithmetic number, because the mean of its divisors is an integer number (111111060936).

Almost surely, 2^222222121871 is an apocalyptic number.

222222121871 is a deficient number, since it is larger than the sum of its proper divisors (1).

222222121871 is an equidigital number, since it uses as much as digits as its factorization.

222222121871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7168, while the sum is 32.

The spelling of 222222121871 in words is "two hundred twenty-two billion, two hundred twenty-two million, one hundred twenty-one thousand, eight hundred seventy-one".