123221021343 has 16 divisors (see below), whose sum is σ = 191308110336. Its totient is φ = 69083483040.

The previous prime is 123221021327. The next prime is 123221021359. The reversal of 123221021343 is 343120122321.

It is an interprime number because it is at equal distance from previous prime (123221021327) and next prime (123221021359).

It is not a de Polignac number, because 123221021343 - 2⁴ = 123221021327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123221021743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55354243 + ... + 55356468.

It is an arithmetic number, because the mean of its divisors is an integer number (11956756896).

Almost surely, 2^123221021343 is an apocalyptic number.

123221021343 is a deficient number, since it is larger than the sum of its proper divisors (68087088993).

123221021343 is a wasteful number, since it uses less digits than its factorization.

123221021343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110710774.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 123221021343 its reverse (343120122321), we get a palindrome (466341143664).

The spelling of 123221021343 in words is "one hundred twenty-three billion, two hundred twenty-one million, twenty-one thousand, three hundred forty-three".