1321132012201 has 4 divisors (see below), whose sum is σ = 1321135994452. Its totient is φ = 1321128029952.

The previous prime is 1321132012117. The next prime is 1321132012229. The reversal of 1321132012201 is 1022102311231.

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 720289992601 + 600842019600 = 848699^2 + 775140^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321132012201 - 2¹⁷ = 1321131881129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321132012231) 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, 1443240 + ... + 2173753.

It is an arithmetic number, because the mean of its divisors is an integer number (330283998613).

Almost surely, 2^{1321132012201} is an apocalyptic number.

It is an amenable number.

1321132012201 is a deficient number, since it is larger than the sum of its proper divisors (3982251).

1321132012201 is an equidigital number, since it uses as much as digits as its factorization.

1321132012201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3982250.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1321132012201 its reverse (1022102311231), we get a palindrome (2343234323432).

The spelling of 1321132012201 in words is "one trillion, three hundred twenty-one billion, one hundred thirty-two million, twelve thousand, two hundred one".