123201040431 has 32 divisors (see below), whose sum is σ = 194251507200. Its totient is φ = 67957948800.

The previous prime is 123201040429. The next prime is 123201040481. The reversal of 123201040431 is 134040102321.

It is not a de Polignac number, because 123201040431 - 2¹ = 123201040429 is a prime.

It is a super-2 number, since 2×123201040431² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 123201040398 and 123201040407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123201040411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3086680 + ... + 3126338.

It is an arithmetic number, because the mean of its divisors is an integer number (6070359600).

Almost surely, 2^123201040431 is an apocalyptic number.

123201040431 is a deficient number, since it is larger than the sum of its proper divisors (71050466769).

123201040431 is a wasteful number, since it uses less digits than its factorization.

123201040431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44799.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 123201040431 its reverse (134040102321), we get a palindrome (257241142752).

The spelling of 123201040431 in words is "one hundred twenty-three billion, two hundred one million, forty thousand, four hundred thirty-one".