123321018943 has 2 divisors, whose sum is σ = 123321018944. Its totient is φ = 123321018942.

The previous prime is 123321018937. The next prime is 123321019001. The reversal of 123321018943 is 349810123321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123321018943 - 2¹⁷ = 123320887871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123321018343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61660509471 + 61660509472.

It is an arithmetic number, because the mean of its divisors is an integer number (61660509472).

Almost surely, 2^123321018943 is an apocalyptic number.

123321018943 is a deficient number, since it is larger than the sum of its proper divisors (1).

123321018943 is an equidigital number, since it uses as much as digits as its factorization.

123321018943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 37.

It can be divided in two parts, 1233210 and 18943, that added together give a triangular number (1252153 = T₁₅₈₂).

The spelling of 123321018943 in words is "one hundred twenty-three billion, three hundred twenty-one million, eighteen thousand, nine hundred forty-three".