222121221097 has 2 divisors, whose sum is σ = 222121221098. Its totient is φ = 222121221096.

The previous prime is 222121221083. The next prime is 222121221181. The reversal of 222121221097 is 790122121222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136766092761 + 85355128336 = 369819^2 + 292156^2 .

It is a cyclic number.

It is not a de Polignac number, because 222121221097 - 2²³ = 222112832489 is a prime.

It is not a weakly prime, because it can be changed into another prime (222121221197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111060610548 + 111060610549.

It is an arithmetic number, because the mean of its divisors is an integer number (111060610549).

Almost surely, 2^222121221097 is an apocalyptic number.

It is an amenable number.

222121221097 is a deficient number, since it is larger than the sum of its proper divisors (1).

222121221097 is an equidigital number, since it uses as much as digits as its factorization.

222121221097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 31.

The spelling of 222121221097 in words is "two hundred twenty-two billion, one hundred twenty-one million, two hundred twenty-one thousand, ninety-seven".