21220021102022 has 16 divisors (see below), whose sum is σ = 32313845701680. Its totient is φ = 10448824877568.

The previous prime is 21220021102001. The next prime is 21220021102039. The reversal of 21220021102022 is 22020112002212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20921747 + ... + 21912542.

It is an arithmetic number, because the mean of its divisors is an integer number (2019615356355).

Almost surely, 2^{21220021102022} is an apocalyptic number.

21220021102022 is a deficient number, since it is larger than the sum of its proper divisors (11093824599658).

21220021102022 is a wasteful number, since it uses less digits than its factorization.

21220021102022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42838055.

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

Adding to 21220021102022 its reverse (22020112002212), we get a palindrome (43240133104234).

The spelling of 21220021102022 in words is "twenty-one trillion, two hundred twenty billion, twenty-one million, one hundred two thousand, twenty-two".