1321212001433 has 4 divisors (see below), whose sum is σ = 1321240163508. Its totient is φ = 1321183839360.

The previous prime is 1321212001423. The next prime is 1321212001481. The reversal of 1321212001433 is 3341002121231.

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 199332782089 + 1121879219344 = 446467^2 + 1059188^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321212001433 - 2²⁶ = 1321144892569 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321212001399 and 1321212001408.

It is not an unprimeable number, because it can be changed into a prime (1321212001423) 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, 14010548 + ... + 14104533.

It is an arithmetic number, because the mean of its divisors is an integer number (330310040877).

Almost surely, 2^{1321212001433} is an apocalyptic number.

It is an amenable number.

1321212001433 is a deficient number, since it is larger than the sum of its proper divisors (28162075).

1321212001433 is an equidigital number, since it uses as much as digits as its factorization.

1321212001433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28162074.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1321212001433 its reverse (3341002121231), we get a palindrome (4662214122664).

The spelling of 1321212001433 in words is "one trillion, three hundred twenty-one billion, two hundred twelve million, one thousand, four hundred thirty-three".