331213043040421 has 2 divisors, whose sum is σ = 331213043040422. Its totient is φ = 331213043040420.

The previous prime is 331213043040367. The next prime is 331213043040457. The reversal of 331213043040421 is 124040340312133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 258338564451396 + 72874478589025 = 16072914^2 + 8536655^2 .

It is a cyclic number.

It is not a de Polignac number, because 331213043040421 - 2¹¹ = 331213043038373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331213041040421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165606521520210 + 165606521520211.

It is an arithmetic number, because the mean of its divisors is an integer number (165606521520211).

Almost surely, 2^{331213043040421} is an apocalyptic number.

It is an amenable number.

331213043040421 is a deficient number, since it is larger than the sum of its proper divisors (1).

331213043040421 is an equidigital number, since it uses as much as digits as its factorization.

331213043040421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 331213043040421 its reverse (124040340312133), we get a palindrome (455253383352554).

The spelling of 331213043040421 in words is "three hundred thirty-one trillion, two hundred thirteen billion, forty-three million, forty thousand, four hundred twenty-one".