21221011202222 has 8 divisors (see below), whose sum is σ = 34280095019016. Its totient is φ = 9794312862552.

The previous prime is 21221011202213. The next prime is 21221011202233. The reversal of 21221011202222 is 22220211012212.

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

It is a super-2 number, since 2×21221011202222² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21221011202194 and 21221011202203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408096369248 + ... + 408096369299.

It is an arithmetic number, because the mean of its divisors is an integer number (4285011877377).

Almost surely, 2^{21221011202222} is an apocalyptic number.

21221011202222 is a deficient number, since it is larger than the sum of its proper divisors (13059083816794).

21221011202222 is a wasteful number, since it uses less digits than its factorization.

21221011202222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816192738562.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21221011202222 its reverse (22220211012212), we get a palindrome (43441222214434).

The spelling of 21221011202222 in words is "twenty-one trillion, two hundred twenty-one billion, eleven million, two hundred two thousand, two hundred twenty-two".