1321555201433 has 8 divisors (see below), whose sum is σ = 1341308504352. Its totient is φ = 1301802739776.

The previous prime is 1321555201427. The next prime is 1321555201457. The reversal of 1321555201433 is 3341025551231.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1321555201433 - 2¹⁰ = 1321555200409 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321555201393 and 1321555201402.

It is not an unprimeable number, because it can be changed into a prime (1321555201033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3419666 + ... + 3786452.

It is an arithmetic number, because the mean of its divisors is an integer number (167663563044).

Almost surely, 2^{1321555201433} is an apocalyptic number.

It is an amenable number.

1321555201433 is a deficient number, since it is larger than the sum of its proper divisors (19753302919).

1321555201433 is an equidigital number, since it uses as much as digits as its factorization.

1321555201433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420631.

The product of its (nonzero) digits is 54000, while the sum is 35.

The spelling of 1321555201433 in words is "one trillion, three hundred twenty-one billion, five hundred fifty-five million, two hundred one thousand, four hundred thirty-three".