20310321311123 has 4 divisors (see below), whose sum is σ = 20312169899640. Its totient is φ = 20308472722608.

The previous prime is 20310321311113. The next prime is 20310321311129. The reversal of 20310321311123 is 32111312301302.

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 20310321311123 - 2¹² = 20310321307027 is a prime.

It is a super-2 number, since 2×20310321311123² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20310321311129) 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, 924277778 + ... + 924299751.

It is an arithmetic number, because the mean of its divisors is an integer number (5078042474910).

Almost surely, 2^{20310321311123} is an apocalyptic number.

20310321311123 is a deficient number, since it is larger than the sum of its proper divisors (1848588517).

20310321311123 is a wasteful number, since it uses less digits than its factorization.

20310321311123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1848588516.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 20310321311123 its reverse (32111312301302), we get a palindrome (52421633612425).

The spelling of 20310321311123 in words is "twenty trillion, three hundred ten billion, three hundred twenty-one million, three hundred eleven thousand, one hundred twenty-three".