220121212021201 has 2 divisors, whose sum is σ = 220121212021202. Its totient is φ = 220121212021200.

The previous prime is 220121212021187. The next prime is 220121212021303. The reversal of 220121212021201 is 102120212121022.

220121212021201 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., 156698321126400 + 63422890894801 = 12517920^2 + 7963849^2 .

It is a cyclic number.

It is not a de Polignac number, because 220121212021201 - 2⁴¹ = 217922188765649 is a prime.

It is not a weakly prime, because it can be changed into another prime (220121212021801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110060606010600 + 110060606010601.

It is an arithmetic number, because the mean of its divisors is an integer number (110060606010601).

Almost surely, 2^{220121212021201} is an apocalyptic number.

It is an amenable number.

220121212021201 is a deficient number, since it is larger than the sum of its proper divisors (1).

220121212021201 is an equidigital number, since it uses as much as digits as its factorization.

220121212021201 is an evil number, because the sum of its binary digits is even.

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

Adding to 220121212021201 its reverse (102120212121022), we get a palindrome (322241424142223).

The spelling of 220121212021201 in words is "two hundred twenty trillion, one hundred twenty-one billion, two hundred twelve million, twenty-one thousand, two hundred one".