331220123101 has 24 divisors (see below), whose sum is σ = 408598504056. Its totient is φ = 266785505280.

The previous prime is 331220123093. The next prime is 331220123111. The reversal of 331220123101 is 101321022133.

It can be written as a sum of positive squares in 4 ways, for example, as 82168222500 + 249051900601 = 286650^2 + 499051^2 .

It is not a de Polignac number, because 331220123101 - 2³ = 331220123093 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 (331220123111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 223795 + ... + 844111.

It is an arithmetic number, because the mean of its divisors is an integer number (17024937669).

Almost surely, 2^331220123101 is an apocalyptic number.

It is an amenable number.

331220123101 is a deficient number, since it is larger than the sum of its proper divisors (77378380955).

331220123101 is a wasteful number, since it uses less digits than its factorization.

331220123101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620989 (or 620982 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 331220123101 its reverse (101321022133), we get a palindrome (432541145234).

The spelling of 331220123101 in words is "three hundred thirty-one billion, two hundred twenty million, one hundred twenty-three thousand, one hundred one".