123421234443 has 16 divisors (see below), whose sum is σ = 182009972256. Its totient is φ = 73898784000.

The previous prime is 123421234403. The next prime is 123421234471. The reversal of 123421234443 is 344432124321.

It is not a de Polignac number, because 123421234443 - 2¹² = 123421230347 is a prime.

It is a super-2 number, since 2×123421234443² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123421234403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42764058 + ... + 42766943.

It is an arithmetic number, because the mean of its divisors is an integer number (11375623266).

Almost surely, 2^123421234443 is an apocalyptic number.

123421234443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

123421234443 is a deficient number, since it is larger than the sum of its proper divisors (58588737813).

123421234443 is a wasteful number, since it uses less digits than its factorization.

123421234443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85531054.

The product of its digits is 55296, while the sum is 33.

Adding to 123421234443 its reverse (344432124321), we get a palindrome (467853358764).

The spelling of 123421234443 in words is "one hundred twenty-three billion, four hundred twenty-one million, two hundred thirty-four thousand, four hundred forty-three".