20311232213123 has 8 divisors (see below), whose sum is σ = 20966703098880. Its totient is φ = 19655778192840.

The previous prime is 20311232213101. The next prime is 20311232213171. The reversal of 20311232213123 is 32131223211302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20311232213123 - 2²⁸ = 20310963777667 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20311232213092 and 20311232213101.

It is not an unprimeable number, because it can be changed into a prime (20311232213023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1745903 + ... + 6608376.

It is an arithmetic number, because the mean of its divisors is an integer number (2620837887360).

Almost surely, 2^{20311232213123} is an apocalyptic number.

20311232213123 is a deficient number, since it is larger than the sum of its proper divisors (655470885757).

20311232213123 is an equidigital number, since it uses as much as digits as its factorization.

20311232213123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8432737.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 20311232213123 its reverse (32131223211302), we get a palindrome (52442455424425).

The spelling of 20311232213123 in words is "twenty trillion, three hundred eleven billion, two hundred thirty-two million, two hundred thirteen thousand, one hundred twenty-three".