210123131002031 has 4 divisors (see below), whose sum is σ = 226286448771432. Its totient is φ = 193959813232632.

The previous prime is 210123131002007. The next prime is 210123131002061. The reversal of 210123131002031 is 130200131321012.

It is a happy number.

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-210123131002031 is a prime.

It is a super-2 number, since 2×210123131002031² (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 = 210123131001994 and 210123131002012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210123131002061) 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, 8081658884681 + ... + 8081658884706.

It is an arithmetic number, because the mean of its divisors is an integer number (56571612192858).

Almost surely, 2^{210123131002031} is an apocalyptic number.

210123131002031 is a deficient number, since it is larger than the sum of its proper divisors (16163317769401).

210123131002031 is a wasteful number, since it uses less digits than its factorization.

210123131002031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16163317769400.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 210123131002031 its reverse (130200131321012), we get a palindrome (340323262323043).

The spelling of 210123131002031 in words is "two hundred ten trillion, one hundred twenty-three billion, one hundred thirty-one million, two thousand, thirty-one".