331221110202121 has 48 divisors (see below), whose sum is σ = 339715292958720. Its totient is φ = 322887122173440.

The previous prime is 331221110202049. The next prime is 331221110202131. The reversal of 331221110202121 is 121202011122133.

It is a happy number.

It is not a de Polignac number, because 331221110202121 - 2³⁹ = 330671354388233 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 331221110202092 and 331221110202101.

It is not an unprimeable number, because it can be changed into a prime (331221110202131) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 199892039125 + ... + 199892040781.

It is an arithmetic number, because the mean of its divisors is an integer number (7077401936640).

Almost surely, 2^{331221110202121} is an apocalyptic number.

It is an amenable number.

331221110202121 is a deficient number, since it is larger than the sum of its proper divisors (8494182756599).

331221110202121 is a wasteful number, since it uses less digits than its factorization.

331221110202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2662 (or 2483 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 331221110202121 its reverse (121202011122133), we get a palindrome (452423121324254).

The spelling of 331221110202121 in words is "three hundred thirty-one trillion, two hundred twenty-one billion, one hundred ten million, two hundred two thousand, one hundred twenty-one".