21231311220222 has 8 divisors (see below), whose sum is σ = 42462622440456. Its totient is φ = 7077103740072.

The previous prime is 21231311220199. The next prime is 21231311220299. The reversal of 21231311220222 is 22202211313212.

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

21231311220222 is an admirable number.

It is a super-2 number, since 2×21231311220222² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21231311220192 and 21231311220201.

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, 1769275935013 + ... + 1769275935024.

It is an arithmetic number, because the mean of its divisors is an integer number (5307827805057).

Almost surely, 2^{21231311220222} is an apocalyptic number.

21231311220222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21231311220222 is a wasteful number, since it uses less digits than its factorization.

21231311220222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3538551870042.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 21231311220222 its reverse (22202211313212), we get a palindrome (43433522533434).

The spelling of 21231311220222 in words is "twenty-one trillion, two hundred thirty-one billion, three hundred eleven million, two hundred twenty thousand, two hundred twenty-two".