331221320222 has 16 divisors (see below), whose sum is σ = 535365932640. Its totient is φ = 152781062112.

The previous prime is 331221320203. The next prime is 331221320239. The reversal of 331221320222 is 222023122133.

It is a super-2 number, since 2×331221320222² (a number of 24 digits) contains 22 as substring.

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 in 7 ways as a sum of consecutive naturals, for example, 3718322 + ... + 3806357.

It is an arithmetic number, because the mean of its divisors is an integer number (33460370790).

Almost surely, 2^331221320222 is an apocalyptic number.

331221320222 is a deficient number, since it is larger than the sum of its proper divisors (204144612418).

331221320222 is a wasteful number, since it uses less digits than its factorization.

331221320222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7526387.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 331221320222 its reverse (222023122133), we get a palindrome (553244442355).

The spelling of 331221320222 in words is "three hundred thirty-one billion, two hundred twenty-one million, three hundred twenty thousand, two hundred twenty-two".