212020022221221 has 16 divisors (see below), whose sum is σ = 315076194014400. Its totient is φ = 126030477604608.

The previous prime is 212020022221219. The next prime is 212020022221229. The reversal of 212020022221221 is 122122220020212.

It is not a de Polignac number, because 212020022221221 - 2¹ = 212020022221219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212020022221229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109401455286 + ... + 109401457223.

It is an arithmetic number, because the mean of its divisors is an integer number (19692262125900).

Almost surely, 2^{212020022221221} is an apocalyptic number.

It is an amenable number.

212020022221221 is a deficient number, since it is larger than the sum of its proper divisors (103056171793179).

212020022221221 is a wasteful number, since it uses less digits than its factorization.

212020022221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218802912548.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 212020022221221 its reverse (122122220020212), we get a palindrome (334142242241433).

The spelling of 212020022221221 in words is "two hundred twelve trillion, twenty billion, twenty-two million, two hundred twenty-one thousand, two hundred twenty-one".