1331231222 has 8 divisors (see below), whose sum is σ = 1997205672. Its totient is φ = 665496000.

The previous prime is 1331231197. The next prime is 1331231261. The reversal of 1331231222 is 2221321331.

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

It is a super-2 number, since 2×1331231222² = 3544353132855226568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1331231194 and 1331231203.

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, 45179 + ... + 68582.

It is an arithmetic number, because the mean of its divisors is an integer number (249650709).

Almost surely, 2^1331231222 is an apocalyptic number.

1331231222 is a deficient number, since it is larger than the sum of its proper divisors (665974450).

1331231222 is a wasteful number, since it uses less digits than its factorization.

1331231222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119614.

The product of its digits is 432, while the sum is 20.

The square root of 1331231222 is about 36486.0414679367. The cubic root of 1331231222 is about 1100.0636938325.

Adding to 1331231222 its reverse (2221321331), we get a palindrome (3552552553).

The spelling of 1331231222 in words is "one billion, three hundred thirty-one million, two hundred thirty-one thousand, two hundred twenty-two".