123122443321421 has 12 divisors (see below), whose sum is σ = 128724530760000. Its totient is φ = 117754477704600.

The previous prime is 123122443321417. The next prime is 123122443321433. The reversal of 123122443321421 is 124123344221321.

It is not a de Polignac number, because 123122443321421 - 2² = 123122443321417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123122413321421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10430171 + ... + 18842328.

It is an arithmetic number, because the mean of its divisors is an integer number (10727044230000).

Almost surely, 2^{123122443321421} is an apocalyptic number.

It is an amenable number.

123122443321421 is a deficient number, since it is larger than the sum of its proper divisors (5602087438579).

123122443321421 is an equidigital number, since it uses as much as digits as its factorization.

123122443321421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29280496 (or 29280473 counting only the distinct ones).

The product of its digits is 55296, while the sum is 35.

Adding to 123122443321421 its reverse (124123344221321), we get a palindrome (247245787542742).

The spelling of 123122443321421 in words is "one hundred twenty-three trillion, one hundred twenty-two billion, four hundred forty-three million, three hundred twenty-one thousand, four hundred twenty-one".