210323123031 has 16 divisors (see below), whose sum is σ = 321187603968. Its totient is φ = 119923932000.

The previous prime is 210323123009. The next prime is 210323123033. The reversal of 210323123031 is 130321323012.

It is not a de Polignac number, because 210323123031 - 2¹⁰ = 210323122007 is a prime.

It is a super-2 number, since 2×210323123031² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 210323122989 and 210323123007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210323123033) 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, 10852995 + ... + 10872356.

It is an arithmetic number, because the mean of its divisors is an integer number (20074225248).

Almost surely, 2^210323123031 is an apocalyptic number.

210323123031 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

210323123031 is a deficient number, since it is larger than the sum of its proper divisors (110864480937).

210323123031 is a wasteful number, since it uses less digits than its factorization.

210323123031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21725822.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 210323123031 its reverse (130321323012), we get a palindrome (340644446043).

The spelling of 210323123031 in words is "two hundred ten billion, three hundred twenty-three million, one hundred twenty-three thousand, thirty-one".