22121201020220 has 24 divisors (see below), whose sum is σ = 48056402217600. Its totient is φ = 8543360393792.

The previous prime is 22121201020207. The next prime is 22121201020223. The reversal of 22121201020220 is 2202010212122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121201020223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19070000300 + ... + 19070001459.

It is an arithmetic number, because the mean of its divisors is an integer number (2002350092400).

Almost surely, 2^{22121201020220} is an apocalyptic number.

22121201020220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121201020220 is an abundant number, since it is smaller than the sum of its proper divisors (25935201197380).

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

22121201020220 is a wasteful number, since it uses less digits than its factorization.

22121201020220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38140001797 (or 38140001795 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22121201020220 its reverse (2202010212122), we get a palindrome (24323211232342).

The spelling of 22121201020220 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred one million, twenty thousand, two hundred twenty".