331231210012121 has 16 divisors (see below), whose sum is σ = 335304940400640. Its totient is φ = 327171297868800.

The previous prime is 331231210012111. The next prime is 331231210012139. The reversal of 331231210012121 is 121210012132133.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 331231210012121 - 2¹⁸ = 331231209749977 is a prime.

It is a super-2 number, since 2×331231210012121² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331231210012111) 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, 171344096 + ... + 173266446.

It is an arithmetic number, because the mean of its divisors is an integer number (20956558775040).

Almost surely, 2^{331231210012121} is an apocalyptic number.

It is an amenable number.

331231210012121 is a deficient number, since it is larger than the sum of its proper divisors (4073730388519).

331231210012121 is a wasteful number, since it uses less digits than its factorization.

331231210012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1925944.

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

Adding to 331231210012121 its reverse (121210012132133), we get a palindrome (452441222144254).

The spelling of 331231210012121 in words is "three hundred thirty-one trillion, two hundred thirty-one billion, two hundred ten million, twelve thousand, one hundred twenty-one".