31222030221 has 48 divisors (see below), whose sum is σ = 49006863360. Its totient is φ = 19081474560.

The previous prime is 31222030219. The next prime is 31222030291. The reversal of 31222030221 is 12203022213.

It is not a de Polignac number, because 31222030221 - 2¹ = 31222030219 is a prime.

It is a super-2 number, since 2×31222030221² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31222030194 and 31222030203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31222030291) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 945060 + ... + 977538.

It is an arithmetic number, because the mean of its divisors is an integer number (1020976320).

Almost surely, 2^31222030221 is an apocalyptic number.

It is an amenable number.

31222030221 is a deficient number, since it is larger than the sum of its proper divisors (17784833139).

31222030221 is a wasteful number, since it uses less digits than its factorization.

31222030221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32666 (or 32663 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 31222030221 its reverse (12203022213), we get a palindrome (43425052434).

The spelling of 31222030221 in words is "thirty-one billion, two hundred twenty-two million, thirty thousand, two hundred twenty-one".