1321220330 has 8 divisors (see below), whose sum is σ = 2378196612. Its totient is φ = 528488128.

The previous prime is 1321220317. The next prime is 1321220359. The reversal of 1321220330 is 330221231.

It can be written as a sum of positive squares in 2 ways, for example, as 1320668281 + 552049 = 36341^2 + 743^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1321220299 and 1321220308.

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, 66061007 + ... + 66061026.

Almost surely, 2^1321220330 is an apocalyptic number.

1321220330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321220330 is a deficient number, since it is larger than the sum of its proper divisors (1056976282).

1321220330 is a wasteful number, since it uses less digits than its factorization.

1321220330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132122040.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1321220330 is about 36348.5946083201. The cubic root of 1321220330 is about 1097.2992505073.

Adding to 1321220330 its reverse (330221231), we get a palindrome (1651441561).

Subtracting from 1321220330 its reverse (330221231), we obtain a palindrome (990999099).

It can be divided in two parts, 13212203 and 30, that multiplied together give a triangular number (396366090 = T₂₈₁₅₅).

The spelling of 1321220330 in words is "one billion, three hundred twenty-one million, two hundred twenty thousand, three hundred thirty".