123210100031 has 16 divisors (see below), whose sum is σ = 138247935840. Its totient is φ = 109232901120.

The previous prime is 123210100019. The next prime is 123210100073. The reversal of 123210100031 is 130001012321.

It is a cyclic number.

It is not a de Polignac number, because 123210100031 - 2⁶ = 123210099967 is a prime.

It is a super-2 number, since 2×123210100031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123210099979 and 123210100015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123210100331) 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, 3027581 + ... + 3068006.

It is an arithmetic number, because the mean of its divisors is an integer number (8640495990).

Almost surely, 2^123210100031 is an apocalyptic number.

123210100031 is a deficient number, since it is larger than the sum of its proper divisors (15037835809).

123210100031 is a wasteful number, since it uses less digits than its factorization.

123210100031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6095674.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 123210100031 its reverse (130001012321), we get a palindrome (253211112352).

The spelling of 123210100031 in words is "one hundred twenty-three billion, two hundred ten million, one hundred thousand, thirty-one".