222000012223861 has 2 divisors, whose sum is σ = 222000012223862. Its totient is φ = 222000012223860.

The previous prime is 222000012223859. The next prime is 222000012223933. The reversal of 222000012223861 is 168322210000222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220326078258225 + 1673933965636 = 14843385^2 + 1293806^2 .

It is a cyclic number.

It is not a de Polignac number, because 222000012223861 - 2¹ = 222000012223859 is a prime.

Together with 222000012223859, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222000012223841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111000006111930 + 111000006111931.

It is an arithmetic number, because the mean of its divisors is an integer number (111000006111931).

Almost surely, 2^{222000012223861} is an apocalyptic number.

It is an amenable number.

222000012223861 is a deficient number, since it is larger than the sum of its proper divisors (1).

222000012223861 is an equidigital number, since it uses as much as digits as its factorization.

222000012223861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 31.

The spelling of 222000012223861 in words is "two hundred twenty-two trillion, twelve million, two hundred twenty-three thousand, eight hundred sixty-one".