1321111033 has 12 divisors (see below), whose sum is σ = 1461896100. Its totient is φ = 1192933280.

The previous prime is 1321111009. The next prime is 1321111049. The reversal of 1321111033 is 3301111231.

It can be written as a sum of positive squares in 2 ways, for example, as 179211769 + 1141899264 = 13387^2 + 33792^2 .

It is not a de Polignac number, because 1321111033 - 2²⁵ = 1287556601 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321110998 and 1321111016.

It is not an unprimeable number, because it can be changed into a prime (1321111093) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18610 + ... + 54667.

It is an arithmetic number, because the mean of its divisors is an integer number (121824675).

Almost surely, 2^1321111033 is an apocalyptic number.

It is an amenable number.

1321111033 is a deficient number, since it is larger than the sum of its proper divisors (140785067).

1321111033 is a wasteful number, since it uses less digits than its factorization.

1321111033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73448 (or 73437 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1321111033 is about 36347.0911215740. The cubic root of 1321111033 is about 1097.2689919096.

Adding to 1321111033 its reverse (3301111231), we get a palindrome (4622222264).

The spelling of 1321111033 in words is "one billion, three hundred twenty-one million, one hundred eleven thousand, thirty-three".