331121020321021 has 32 divisors (see below), whose sum is σ = 409530126325760. Its totient is φ = 261342649060416.

The previous prime is 331121020321009. The next prime is 331121020321027. The reversal of 331121020321021 is 120123020121133.

It is not a de Polignac number, because 331121020321021 - 2¹⁹ = 331121019796733 is a prime.

It is a super-2 number, since 2×331121020321021² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 331121020320983 and 331121020321001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331121020321027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30033195 + ... + 39550408.

It is an arithmetic number, because the mean of its divisors is an integer number (12797816447680).

Almost surely, 2^{331121020321021} is an apocalyptic number.

It is an amenable number.

331121020321021 is a deficient number, since it is larger than the sum of its proper divisors (78409106004739).

331121020321021 is a wasteful number, since it uses less digits than its factorization.

331121020321021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69584633.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 331121020321021 its reverse (120123020121133), we get a palindrome (451244040442154).

The spelling of 331121020321021 in words is "three hundred thirty-one trillion, one hundred twenty-one billion, twenty million, three hundred twenty-one thousand, twenty-one".