21222201022 has 16 divisors (see below), whose sum is σ = 36770017392. Its totient is φ = 9079016320.

The previous prime is 21222200983. The next prime is 21222201047. The reversal of 21222201022 is 22010222212.

It is a junction number, because it is equal to n+sod(n) for n = 21222200987 and 21222201005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28371553 + ... + 28372300.

It is an arithmetic number, because the mean of its divisors is an integer number (2298126087).

Almost surely, 2^21222201022 is an apocalyptic number.

21222201022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21222201022 is a deficient number, since it is larger than the sum of its proper divisors (15547816370).

21222201022 is a wasteful number, since it uses less digits than its factorization.

21222201022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56743883.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21222201022 its reverse (22010222212), we get a palindrome (43232423234).

The spelling of 21222201022 in words is "twenty-one billion, two hundred twenty-two million, two hundred one thousand, twenty-two".