1331320222 has 4 divisors (see below), whose sum is σ = 1996980336. Its totient is φ = 665660110.

The previous prime is 1331320171. The next prime is 1331320231. The reversal of 1331320222 is 2220231331.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×1331320222² = 3544827067012258568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1331320222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332830054 + ... + 332830057.

It is an arithmetic number, because the mean of its divisors is an integer number (499245084).

Almost surely, 2^1331320222 is an apocalyptic number.

1331320222 is a deficient number, since it is larger than the sum of its proper divisors (665660114).

1331320222 is an equidigital number, since it uses as much as digits as its factorization.

1331320222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665660113.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1331320222 is about 36487.2610920579. The cubic root of 1331320222 is about 1100.0882083534.

Adding to 1331320222 its reverse (2220231331), we get a palindrome (3551551553).

The spelling of 1331320222 in words is "one billion, three hundred thirty-one million, three hundred twenty thousand, two hundred twenty-two".