321434434091 has 2 divisors, whose sum is σ = 321434434092. Its totient is φ = 321434434090.

The previous prime is 321434434081. The next prime is 321434434129. The reversal of 321434434091 is 190434434123.

It is an a-pointer prime, because the next prime (321434434129) can be obtained adding 321434434091 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321434434091 - 2²² = 321430239787 is a prime.

It is not a weakly prime, because it can be changed into another prime (321434434081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160717217045 + 160717217046.

It is an arithmetic number, because the mean of its divisors is an integer number (160717217046).

Almost surely, 2^321434434091 is an apocalyptic number.

321434434091 is a deficient number, since it is larger than the sum of its proper divisors (1).

321434434091 is an equidigital number, since it uses as much as digits as its factorization.

321434434091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 38.

The spelling of 321434434091 in words is "three hundred twenty-one billion, four hundred thirty-four million, four hundred thirty-four thousand, ninety-one".