210321311123 has 32 divisors (see below), whose sum is σ = 266006495232. Its totient is φ = 161522726400.

The previous prime is 210321311071. The next prime is 210321311143. The reversal of 210321311123 is 321113123012.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-210321311123 is a prime.

It is a super-2 number, since 2×210321311123² (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 = 210321311095 and 210321311104.

It is not an unprimeable number, because it can be changed into a prime (210321311143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8041838 + ... + 8067948.

It is an arithmetic number, because the mean of its divisors is an integer number (8312702976).

Almost surely, 2^210321311123 is an apocalyptic number.

210321311123 is a deficient number, since it is larger than the sum of its proper divisors (55685184109).

210321311123 is a wasteful number, since it uses less digits than its factorization.

210321311123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27635.

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

Adding to 210321311123 its reverse (321113123012), we get a palindrome (531434434135).

The spelling of 210321311123 in words is "two hundred ten billion, three hundred twenty-one million, three hundred eleven thousand, one hundred twenty-three".