1321142033 has 4 divisors (see below), whose sum is σ = 1321296180. Its totient is φ = 1320987888.

The previous prime is 1321142023. The next prime is 1321142051. The reversal of 1321142033 is 3302411231.

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

It can be written as a sum of positive squares in 2 ways, for example, as 586027264 + 735114769 = 24208^2 + 27113^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321142033 - 2²² = 1316947729 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1321141996 and 1321142014.

It is not an unprimeable number, because it can be changed into a prime (1321142003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63410 + ... + 81627.

It is an arithmetic number, because the mean of its divisors is an integer number (330324045).

Almost surely, 2^1321142033 is an apocalyptic number.

It is an amenable number.

1321142033 is a deficient number, since it is larger than the sum of its proper divisors (154147).

1321142033 is an equidigital number, since it uses as much as digits as its factorization.

1321142033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154146.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1321142033 is about 36347.5175631019. The cubic root of 1321142033 is about 1097.2775743507.

Adding to 1321142033 its reverse (3302411231), we get a palindrome (4623553264).

The spelling of 1321142033 in words is "one billion, three hundred twenty-one million, one hundred forty-two thousand, thirty-three".