1331021322 has 32 divisors (see below), whose sum is σ = 2994351360. Its totient is φ = 443672316.

The previous prime is 1331021303. The next prime is 1331021333. The reversal of 1331021322 is 2231201331.

1331021322 is a `hidden beast` number, since 13 + 310 + 21 + 322 = 666.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1331021295 and 1331021304.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147778 + ... + 156525.

It is an arithmetic number, because the mean of its divisors is an integer number (93573480).

Almost surely, 2^1331021322 is an apocalyptic number.

1331021322 is an abundant number, since it is smaller than the sum of its proper divisors (1663330038).

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

1331021322 is an frugal number, since it uses more digits than its factorization.

1331021322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304326 (or 304308 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1331021322 is about 36483.1649120522. The cubic root of 1331021322 is about 1100.0058737978.

Adding to 1331021322 its reverse (2231201331), we get a palindrome (3562222653).

Subtracting 1331021322 from its reverse (2231201331), we obtain a square (900180009 = 30003²).

The spelling of 1331021322 in words is "one billion, three hundred thirty-one million, twenty-one thousand, three hundred twenty-two".