3421220241991 has 2 divisors, whose sum is σ = 3421220241992. Its totient is φ = 3421220241990.

The previous prime is 3421220241983. The next prime is 3421220242007. The reversal of 3421220241991 is 1991420221243.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3421220241991 - 2³ = 3421220241983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3421220241931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1710610120995 + 1710610120996.

It is an arithmetic number, because the mean of its divisors is an integer number (1710610120996).

Almost surely, 2^{3421220241991} is an apocalyptic number.

3421220241991 is a deficient number, since it is larger than the sum of its proper divisors (1).

3421220241991 is an equidigital number, since it uses as much as digits as its factorization.

3421220241991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 40.

The spelling of 3421220241991 in words is "three trillion, four hundred twenty-one billion, two hundred twenty million, two hundred forty-one thousand, nine hundred ninety-one".