222121120110121 has 2 divisors, whose sum is σ = 222121120110122. Its totient is φ = 222121120110120.

The previous prime is 222121120110053. The next prime is 222121120110137. The reversal of 222121120110121 is 121011021121222.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202950339492096 + 19170780618025 = 14246064^2 + 4378445^2 .

It is a cyclic number.

It is not a de Polignac number, because 222121120110121 - 2²³ = 222121111721513 is a prime.

It is not a weakly prime, because it can be changed into another prime (222121120110161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111060560055060 + 111060560055061.

It is an arithmetic number, because the mean of its divisors is an integer number (111060560055061).

Almost surely, 2^{222121120110121} is an apocalyptic number.

It is an amenable number.

222121120110121 is a deficient number, since it is larger than the sum of its proper divisors (1).

222121120110121 is an equidigital number, since it uses as much as digits as its factorization.

222121120110121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 222121120110121 its reverse (121011021121222), we get a palindrome (343132141231343).

The spelling of 222121120110121 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, one hundred twenty million, one hundred ten thousand, one hundred twenty-one".