123040101031 has 4 divisors (see below), whose sum is σ = 123388656912. Its totient is φ = 122691545152.

The previous prime is 123040101013. The next prime is 123040101047. The reversal of 123040101031 is 130101040321.

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 123040101031 - 2¹³ = 123040092839 is a prime.

It is a super-2 number, since 2×123040101031² (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 = 123040100996 and 123040101014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123040101001) 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, 174277411 + ... + 174278116.

It is an arithmetic number, because the mean of its divisors is an integer number (30847164228).

Almost surely, 2^123040101031 is an apocalyptic number.

123040101031 is a deficient number, since it is larger than the sum of its proper divisors (348555881).

123040101031 is an equidigital number, since it uses as much as digits as its factorization.

123040101031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348555880.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 123040101031 its reverse (130101040321), we get a palindrome (253141141352).

The spelling of 123040101031 in words is "one hundred twenty-three billion, forty million, one hundred one thousand, thirty-one".