221020121222022 has 24 divisors (see below), whose sum is σ = 462094998251544. Its totient is φ = 70470183577024.

The previous prime is 221020121221973. The next prime is 221020121222027. The reversal of 221020121222022 is 220222121020122.

It is a self number, because there is not a number n which added to its sum of digits gives 221020121222022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221020121222027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34817281203 + ... + 34817287550.

It is an arithmetic number, because the mean of its divisors is an integer number (19253958260481).

Almost surely, 2^{221020121222022} is an apocalyptic number.

221020121222022 is an abundant number, since it is smaller than the sum of its proper divisors (241074877029522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221020121222022 is a wasteful number, since it uses less digits than its factorization.

221020121222022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69634568804 (or 69634568781 counting only the distinct ones).

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

Adding to 221020121222022 its reverse (220222121020122), we get a palindrome (441242242242144).

The spelling of 221020121222022 in words is "two hundred twenty-one trillion, twenty billion, one hundred twenty-one million, two hundred twenty-two thousand, twenty-two".