123011331000231 has 4 divisors (see below), whose sum is σ = 164015108000312. Its totient is φ = 82007554000152.

The previous prime is 123011331000203. The next prime is 123011331000247. The reversal of 123011331000231 is 132000133110321.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-123011331000231 is a prime.

It is a super-2 number, since 2×123011331000231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123011331000198 and 123011331000207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123011331000331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20501888500036 + ... + 20501888500041.

It is an arithmetic number, because the mean of its divisors is an integer number (41003777000078).

Almost surely, 2^{123011331000231} is an apocalyptic number.

123011331000231 is a deficient number, since it is larger than the sum of its proper divisors (41003777000081).

123011331000231 is an equidigital number, since it uses as much as digits as its factorization.

123011331000231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41003777000080.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 123011331000231 its reverse (132000133110321), we get a palindrome (255011464110552).

The spelling of 123011331000231 in words is "one hundred twenty-three trillion, eleven billion, three hundred thirty-one million, two hundred thirty-one", and thus it is an aban number.