20023211230123 has 4 divisors (see below), whose sum is σ = 20026396095840. Its totient is φ = 20020026364408.

The previous prime is 20023211230081. The next prime is 20023211230157. The reversal of 20023211230123 is 32103211232002.

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-20023211230123 is a prime.

It is a super-2 number, since 2×20023211230123² (a number of 27 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 = 20023211230094 and 20023211230103.

It is not an unprimeable number, because it can be changed into a prime (20023211230163) 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, 1592423428 + ... + 1592436001.

It is an arithmetic number, because the mean of its divisors is an integer number (5006599023960).

Almost surely, 2^{20023211230123} is an apocalyptic number.

20023211230123 is a deficient number, since it is larger than the sum of its proper divisors (3184865717).

20023211230123 is an equidigital number, since it uses as much as digits as its factorization.

20023211230123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3184865716.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 20023211230123 its reverse (32103211232002), we get a palindrome (52126422462125).

The spelling of 20023211230123 in words is "twenty trillion, twenty-three billion, two hundred eleven million, two hundred thirty thousand, one hundred twenty-three".