331220212022021 has 24 divisors (see below), whose sum is σ = 392049491333760. Its totient is φ = 274106993864256.

The previous prime is 331220212021991. The next prime is 331220212022039. The reversal of 331220212022021 is 120220212022133.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-331220212022021 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 (331220212022521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 265452320 + ... + 266697158.

It is an arithmetic number, because the mean of its divisors is an integer number (16335395472240).

Almost surely, 2^{331220212022021} is an apocalyptic number.

It is an amenable number.

331220212022021 is a deficient number, since it is larger than the sum of its proper divisors (60829279311739).

331220212022021 is a wasteful number, since it uses less digits than its factorization.

331220212022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1290101 (or 1290072 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 331220212022021 its reverse (120220212022133), we get a palindrome (451440424044154).

The spelling of 331220212022021 in words is "three hundred thirty-one trillion, two hundred twenty billion, two hundred twelve million, twenty-two thousand, twenty-one".