1204332131221 has 4 divisors (see below), whose sum is σ = 1207428101100. Its totient is φ = 1201236161344.

The previous prime is 1204332131201. The next prime is 1204332131239. The reversal of 1204332131221 is 1221312334021.

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 849372364996 + 354959766225 = 921614^2 + 595785^2 .

It is a cyclic number.

It is not a de Polignac number, because 1204332131221 - 2¹⁷ = 1204332000149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1204332131201) 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, 1547984356 + ... + 1547985133.

It is an arithmetic number, because the mean of its divisors is an integer number (301857025275).

Almost surely, 2^{1204332131221} is an apocalyptic number.

It is an amenable number.

1204332131221 is a deficient number, since it is larger than the sum of its proper divisors (3095969879).

1204332131221 is an equidigital number, since it uses as much as digits as its factorization.

1204332131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3095969878.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 1204332131221 its reverse (1221312334021), we get a palindrome (2425644465242).

The spelling of 1204332131221 in words is "one trillion, two hundred four billion, three hundred thirty-two million, one hundred thirty-one thousand, two hundred twenty-one".