31223020100323 has 4 divisors (see below), whose sum is σ = 31223339038000. Its totient is φ = 31222701162648.

The previous prime is 31223020100303. The next prime is 31223020100351. The reversal of 31223020100323 is 32300102032213.

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-31223020100323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31223020100294 and 31223020100303.

It is not an unprimeable number, because it can be changed into a prime (31223020100303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159321948 + ... + 159517801.

It is an arithmetic number, because the mean of its divisors is an integer number (7805834759500).

Almost surely, 2^{31223020100323} is an apocalyptic number.

31223020100323 is a deficient number, since it is larger than the sum of its proper divisors (318937677).

31223020100323 is an equidigital number, since it uses as much as digits as its factorization.

31223020100323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318937676.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 31223020100323 its reverse (32300102032213), we get a palindrome (63523122132536).

The spelling of 31223020100323 in words is "thirty-one trillion, two hundred twenty-three billion, twenty million, one hundred thousand, three hundred twenty-three".