20112310223123 has 4 divisors (see below), whose sum is σ = 20540231717280. Its totient is φ = 19684388728968.

The previous prime is 20112310223101. The next prime is 20112310223153. The reversal of 20112310223123 is 32132201321102.

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 20112310223123 - 2⁸ = 20112310222867 is a prime.

It is a super-2 number, since 2×20112310223123² (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 (20112310223153) 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, 213960747008 + ... + 213960747101.

It is an arithmetic number, because the mean of its divisors is an integer number (5135057929320).

Almost surely, 2^{20112310223123} is an apocalyptic number.

20112310223123 is a deficient number, since it is larger than the sum of its proper divisors (427921494157).

20112310223123 is an equidigital number, since it uses as much as digits as its factorization.

20112310223123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427921494156.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 20112310223123 its reverse (32132201321102), we get a palindrome (52244511544225).

The spelling of 20112310223123 in words is "twenty trillion, one hundred twelve billion, three hundred ten million, two hundred twenty-three thousand, one hundred twenty-three".