222122300021221 has 2 divisors, whose sum is σ = 222122300021222. Its totient is φ = 222122300021220.

The previous prime is 222122300021161. The next prime is 222122300021341. The reversal of 222122300021221 is 122120003221222.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123434566432321 + 98687733588900 = 11110111^2 + 9934170^2 .

It is a cyclic number.

It is not a de Polignac number, because 222122300021221 - 2³¹ = 222120152537573 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222122300021192 and 222122300021201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222122300022221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111061150010610 + 111061150010611.

It is an arithmetic number, because the mean of its divisors is an integer number (111061150010611).

Almost surely, 2^{222122300021221} is an apocalyptic number.

It is an amenable number.

222122300021221 is a deficient number, since it is larger than the sum of its proper divisors (1).

222122300021221 is an equidigital number, since it uses as much as digits as its factorization.

222122300021221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 222122300021221 its reverse (122120003221222), we get a palindrome (344242303242443).

The spelling of 222122300021221 in words is "two hundred twenty-two trillion, one hundred twenty-two billion, three hundred million, twenty-one thousand, two hundred twenty-one".