21220221010022 has 8 divisors (see below), whose sum is σ = 31830867404136. Its totient is φ = 10609931875312.

The previous prime is 21220221010007. The next prime is 21220221010033. The reversal of 21220221010022 is 22001012202212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89166308 + ... + 89403975.

It is an arithmetic number, because the mean of its divisors is an integer number (3978858425517).

Almost surely, 2^{21220221010022} is an apocalyptic number.

21220221010022 is a deficient number, since it is larger than the sum of its proper divisors (10610646394114).

21220221010022 is a wasteful number, since it uses less digits than its factorization.

21220221010022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178629702.

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

Adding to 21220221010022 its reverse (22001012202212), we get a palindrome (43221233212234).

The spelling of 21220221010022 in words is "twenty-one trillion, two hundred twenty billion, two hundred twenty-one million, ten thousand, twenty-two".