331132021121261 has 2 divisors, whose sum is σ = 331132021121262. Its totient is φ = 331132021121260.

The previous prime is 331132021121227. The next prime is 331132021121327. The reversal of 331132021121261 is 162121120231133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 171518967075625 + 159613054045636 = 13096525^2 + 12633806^2 .

It is a cyclic number.

It is not a de Polignac number, because 331132021121261 - 2²² = 331132016926957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331132021120261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165566010560630 + 165566010560631.

It is an arithmetic number, because the mean of its divisors is an integer number (165566010560631).

Almost surely, 2^{331132021121261} is an apocalyptic number.

It is an amenable number.

331132021121261 is a deficient number, since it is larger than the sum of its proper divisors (1).

331132021121261 is an equidigital number, since it uses as much as digits as its factorization.

331132021121261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

Adding to 331132021121261 its reverse (162121120231133), we get a palindrome (493253141352394).

The spelling of 331132021121261 in words is "three hundred thirty-one trillion, one hundred thirty-two billion, twenty-one million, one hundred twenty-one thousand, two hundred sixty-one".