123220134401 has 16 divisors (see below), whose sum is σ = 151799964288. Its totient is φ = 97400016000.

The previous prime is 123220134391. The next prime is 123220134407. The reversal of 123220134401 is 104431022321.

It is a de Polignac number, because none of the positive numbers 2^k-123220134401 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123220134407) 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, 548540 + ... + 739821.

It is an arithmetic number, because the mean of its divisors is an integer number (9487497768).

Almost surely, 2^123220134401 is an apocalyptic number.

It is an amenable number.

123220134401 is a deficient number, since it is larger than the sum of its proper divisors (28579829887).

123220134401 is a wasteful number, since it uses less digits than its factorization.

123220134401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289432.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 123220134401 its reverse (104431022321), we get a palindrome (227651156722).

The spelling of 123220134401 in words is "one hundred twenty-three billion, two hundred twenty million, one hundred thirty-four thousand, four hundred one".