1221103322 has 4 divisors (see below), whose sum is σ = 1831654986. Its totient is φ = 610551660.

The previous prime is 1221103321. The next prime is 1221103391. The reversal of 1221103322 is 2233011221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2233011221 = 7 ⋅319001603.

It can be written as a sum of positive squares in only one way, i.e., 1177793761 + 43309561 = 34319^2 + 6581^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1221103322.

It is not an unprimeable number, because it can be changed into a prime (1221103321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305275829 + ... + 305275832.

Almost surely, 2^1221103322 is an apocalyptic number.

1221103322 is a deficient number, since it is larger than the sum of its proper divisors (610551664).

1221103322 is an equidigital number, since it uses as much as digits as its factorization.

1221103322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610551663.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1221103322 is about 34944.2888323686. The cubic root of 1221103322 is about 1068.8517457618.

Adding to 1221103322 its reverse (2233011221), we get a palindrome (3454114543).

The spelling of 1221103322 in words is "one billion, two hundred twenty-one million, one hundred three thousand, three hundred twenty-two".