21220201022 has 4 divisors (see below), whose sum is σ = 31830301536. Its totient is φ = 10610100510.

The previous prime is 21220200931. The next prime is 21220201031. The reversal of 21220201022 is 22010202212.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 21220200988 and 21220201006.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5305050254 + ... + 5305050257.

It is an arithmetic number, because the mean of its divisors is an integer number (7957575384).

Almost surely, 2^21220201022 is an apocalyptic number.

21220201022 is a deficient number, since it is larger than the sum of its proper divisors (10610100514).

21220201022 is a wasteful number, since it uses less digits than its factorization.

21220201022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10610100513.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21220201022 its reverse (22010202212), we get a palindrome (43230403234).

The spelling of 21220201022 in words is "twenty-one billion, two hundred twenty million, two hundred one thousand, twenty-two".