3191213420281 has 2 divisors, whose sum is σ = 3191213420282. Its totient is φ = 3191213420280.

The previous prime is 3191213420203. The next prime is 3191213420287. The reversal of 3191213420281 is 1820243121913.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3096262544400 + 94950875881 = 1759620^2 + 308141^2 .

It is a cyclic number.

It is not a de Polignac number, because 3191213420281 - 2¹¹ = 3191213418233 is a prime.

It is a super-2 number, since 2×3191213420281² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3191213420281.

It is not a weakly prime, because it can be changed into another prime (3191213420287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1595606710140 + 1595606710141.

It is an arithmetic number, because the mean of its divisors is an integer number (1595606710141).

Almost surely, 2^{3191213420281} is an apocalyptic number.

It is an amenable number.

3191213420281 is a deficient number, since it is larger than the sum of its proper divisors (1).

3191213420281 is an equidigital number, since it uses as much as digits as its factorization.

3191213420281 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 37.

The spelling of 3191213420281 in words is "three trillion, one hundred ninety-one billion, two hundred thirteen million, four hundred twenty thousand, two hundred eighty-one".