220101202212121 has 2 divisors, whose sum is σ = 220101202212122. Its totient is φ = 220101202212120.

The previous prime is 220101202212083. The next prime is 220101202212139. The reversal of 220101202212121 is 121212202101022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219385716305625 + 715485906496 = 14811675^2 + 845864^2 .

It is a cyclic number.

It is not a de Polignac number, because 220101202212121 - 2⁷ = 220101202211993 is a prime.

It is not a weakly prime, because it can be changed into another prime (220101202215121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110050601106060 + 110050601106061.

It is an arithmetic number, because the mean of its divisors is an integer number (110050601106061).

Almost surely, 2^{220101202212121} is an apocalyptic number.

It is an amenable number.

220101202212121 is a deficient number, since it is larger than the sum of its proper divisors (1).

220101202212121 is an equidigital number, since it uses as much as digits as its factorization.

220101202212121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 220101202212121 its reverse (121212202101022), we get a palindrome (341313404313143).

The spelling of 220101202212121 in words is "two hundred twenty trillion, one hundred one billion, two hundred two million, two hundred twelve thousand, one hundred twenty-one".