331221130012121 has 16 divisors (see below), whose sum is σ = 337779201657600. Its totient is φ = 324725851352448.

The previous prime is 331221130012081. The next prime is 331221130012153. The reversal of 331221130012121 is 121210031122133.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 331221130012121 - 2⁶ = 331221130012057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (331221130015121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2402315 + ... + 25849823.

It is an arithmetic number, because the mean of its divisors is an integer number (21111200103600).

Almost surely, 2^{331221130012121} is an apocalyptic number.

It is an amenable number.

331221130012121 is a deficient number, since it is larger than the sum of its proper divisors (6558071645479).

331221130012121 is a wasteful number, since it uses less digits than its factorization.

331221130012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23448848.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 331221130012121 its reverse (121210031122133), we get a palindrome (452431161134254).

The spelling of 331221130012121 in words is "three hundred thirty-one trillion, two hundred twenty-one billion, one hundred thirty million, twelve thousand, one hundred twenty-one".