331202122221121 has 4 divisors (see below), whose sum is σ = 350684599998852. Its totient is φ = 311719644443392.

The previous prime is 331202122221079. The next prime is 331202122221133. The reversal of 331202122221121 is 121122221202133.

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 275567470050625 + 55634652170496 = 16600225^2 + 7458864^2 .

It is a cyclic number.

It is not a de Polignac number, because 331202122221121 - 2⁷ = 331202122220993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331202122221821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9741238888840 + ... + 9741238888873.

It is an arithmetic number, because the mean of its divisors is an integer number (87671149999713).

Almost surely, 2^{331202122221121} is an apocalyptic number.

It is an amenable number.

331202122221121 is a deficient number, since it is larger than the sum of its proper divisors (19482477777731).

331202122221121 is a wasteful number, since it uses less digits than its factorization.

331202122221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19482477777730.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 331202122221121 its reverse (121122221202133), we get a palindrome (452324343423254).

The spelling of 331202122221121 in words is "three hundred thirty-one trillion, two hundred two billion, one hundred twenty-two million, two hundred twenty-one thousand, one hundred twenty-one".