221021221022022 has 64 divisors (see below), whose sum is σ = 467438588467200. Its totient is φ = 69557111750400.

The previous prime is 221021221021871. The next prime is 221021221022029. The reversal of 221021221022022 is 220220122120122.

It is a self number, because there is not a number n which added to its sum of digits gives 221021221022022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221021221022029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 576738229 + ... + 577121327.

It is an arithmetic number, because the mean of its divisors is an integer number (7303727944800).

Almost surely, 2^{221021221022022} is an apocalyptic number.

221021221022022 is an abundant number, since it is smaller than the sum of its proper divisors (246417367445178).

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

221021221022022 is a wasteful number, since it uses less digits than its factorization.

221021221022022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458829.

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

Adding to 221021221022022 its reverse (220220122120122), we get a palindrome (441241343142144).

The spelling of 221021221022022 in words is "two hundred twenty-one trillion, twenty-one billion, two hundred twenty-one million, twenty-two thousand, twenty-two".