1204212213121 has 8 divisors (see below), whose sum is σ = 1215934999400. Its totient is φ = 1192501699200.

The previous prime is 1204212213119. The next prime is 1204212213131. The reversal of 1204212213121 is 1213122124021.

It can be written as a sum of positive squares in 4 ways, for example, as 308985898225 + 895226314896 = 555865^2 + 946164^2 .

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 1204212213121 - 2¹ = 1204212213119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1204212213092 and 1204212213101.

It is not an unprimeable number, because it can be changed into a prime (1204212213101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2870826 + ... + 3263443.

It is an arithmetic number, because the mean of its divisors is an integer number (151991874925).

Almost surely, 2^{1204212213121} is an apocalyptic number.

It is an amenable number.

1204212213121 is a deficient number, since it is larger than the sum of its proper divisors (11722786279).

1204212213121 is a wasteful number, since it uses less digits than its factorization.

1204212213121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6136179.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 1204212213121 its reverse (1213122124021), we get a palindrome (2417334337142).

The spelling of 1204212213121 in words is "one trillion, two hundred four billion, two hundred twelve million, two hundred thirteen thousand, one hundred twenty-one".