123203202131 has 4 divisors (see below), whose sum is σ = 123647979312. Its totient is φ = 122758424952.

The previous prime is 123203202127. The next prime is 123203202137. The reversal of 123203202131 is 131202302321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123203202131 - 2² = 123203202127 is a prime.

It is a super-2 number, since 2×123203202131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123203202137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222388175 + ... + 222388728.

It is an arithmetic number, because the mean of its divisors is an integer number (30911994828).

Almost surely, 2^123203202131 is an apocalyptic number.

123203202131 is a deficient number, since it is larger than the sum of its proper divisors (444777181).

123203202131 is an equidigital number, since it uses as much as digits as its factorization.

123203202131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444777180.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 123203202131 its reverse (131202302321), we get a palindrome (254405504452).

The spelling of 123203202131 in words is "one hundred twenty-three billion, two hundred three million, two hundred two thousand, one hundred thirty-one".