321231222132109 has 2 divisors, whose sum is σ = 321231222132110. Its totient is φ = 321231222132108.

The previous prime is 321231222132101. The next prime is 321231222132127. The reversal of 321231222132109 is 901231222132123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205419123002500 + 115812099129609 = 14332450^2 + 10761603^2 .

It is an emirp because it is prime and its reverse (901231222132123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 321231222132109 - 2³ = 321231222132101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321231222132101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160615611066054 + 160615611066055.

It is an arithmetic number, because the mean of its divisors is an integer number (160615611066055).

Almost surely, 2^{321231222132109} is an apocalyptic number.

It is an amenable number.

321231222132109 is a deficient number, since it is larger than the sum of its proper divisors (1).

321231222132109 is an equidigital number, since it uses as much as digits as its factorization.

321231222132109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 34.

The spelling of 321231222132109 in words is "three hundred twenty-one trillion, two hundred thirty-one billion, two hundred twenty-two million, one hundred thirty-two thousand, one hundred nine".