123003220031 has 4 divisors (see below), whose sum is σ = 123018071232. Its totient is φ = 122988368832.

The previous prime is 123003220019. The next prime is 123003220037. The reversal of 123003220031 is 130022300321.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123003220031 is a prime.

It is a super-2 number, since 2×123003220031² (a number of 23 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 = 123003219991 and 123003220009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123003220037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7413170 + ... + 7429743.

It is an arithmetic number, because the mean of its divisors is an integer number (30754517808).

Almost surely, 2^123003220031 is an apocalyptic number.

123003220031 is a deficient number, since it is larger than the sum of its proper divisors (14851201).

123003220031 is an equidigital number, since it uses as much as digits as its factorization.

123003220031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14851200.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 123003220031 its reverse (130022300321), we get a palindrome (253025520352).

The spelling of 123003220031 in words is "one hundred twenty-three billion, three million, two hundred twenty thousand, thirty-one".