1321000001033 has 4 divisors (see below), whose sum is σ = 1321437566160. Its totient is φ = 1320562435908.

The previous prime is 1321000001003. The next prime is 1321000001053. The reversal of 1321000001033 is 3301000001231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1321000001033 - 2¹⁴ = 1320999984649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321000000999 and 1321000001017.

It is not an unprimeable number, because it can be changed into a prime (1321000001003) 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, 218778035 + ... + 218784072.

It is an arithmetic number, because the mean of its divisors is an integer number (330359391540).

Almost surely, 2^{1321000001033} is an apocalyptic number.

It is an amenable number.

1321000001033 is a deficient number, since it is larger than the sum of its proper divisors (437565127).

1321000001033 is an equidigital number, since it uses as much as digits as its factorization.

1321000001033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437565126.

The product of its (nonzero) digits is 54, while the sum is 14.

Adding to 1321000001033 its reverse (3301000001231), we get a palindrome (4622000002264).

The spelling of 1321000001033 in words is "one trillion, three hundred twenty-one billion, one thousand, thirty-three".