222012146861 has 2 divisors, whose sum is σ = 222012146862. Its totient is φ = 222012146860.

The previous prime is 222012146857. The next prime is 222012146879. The reversal of 222012146861 is 168641210222.

222012146861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205123844836 + 16888302025 = 452906^2 + 129955^2 .

It is a cyclic number.

It is not a de Polignac number, because 222012146861 - 2² = 222012146857 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222012146821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111006073430 + 111006073431.

It is an arithmetic number, because the mean of its divisors is an integer number (111006073431).

Almost surely, 2^222012146861 is an apocalyptic number.

It is an amenable number.

222012146861 is a deficient number, since it is larger than the sum of its proper divisors (1).

222012146861 is an equidigital number, since it uses as much as digits as its factorization.

222012146861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 35.

The spelling of 222012146861 in words is "two hundred twenty-two billion, twelve million, one hundred forty-six thousand, eight hundred sixty-one".