421034334321091 has 2 divisors, whose sum is σ = 421034334321092. Its totient is φ = 421034334321090.

The previous prime is 421034334321079. The next prime is 421034334321131. The reversal of 421034334321091 is 190123433430124.

It is a happy number.

It is an a-pointer prime, because the next prime (421034334321131) can be obtained adding 421034334321091 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421034334321091 - 2⁵ = 421034334321059 is a prime.

It is not a weakly prime, because it can be changed into another prime (421034334321001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210517167160545 + 210517167160546.

It is an arithmetic number, because the mean of its divisors is an integer number (210517167160546).

Almost surely, 2^{421034334321091} is an apocalyptic number.

421034334321091 is a deficient number, since it is larger than the sum of its proper divisors (1).

421034334321091 is an equidigital number, since it uses as much as digits as its factorization.

421034334321091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 40.

The spelling of 421034334321091 in words is "four hundred twenty-one trillion, thirty-four billion, three hundred thirty-four million, three hundred twenty-one thousand, ninety-one".