20211112112123 has 4 divisors (see below), whose sum is σ = 20233297746528. Its totient is φ = 20188926477720.

The previous prime is 20211112112071. The next prime is 20211112112131. The reversal of 20211112112123 is 32121121111202.

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 20211112112123 - 2⁸ = 20211112111867 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20211112112095 and 20211112112104.

It is not an unprimeable number, because it can be changed into a prime (20211112112143) 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, 11092815836 + ... + 11092817657.

It is an arithmetic number, because the mean of its divisors is an integer number (5058324436632).

Almost surely, 2^{20211112112123} is an apocalyptic number.

20211112112123 is a deficient number, since it is larger than the sum of its proper divisors (22185634405).

20211112112123 is an equidigital number, since it uses as much as digits as its factorization.

20211112112123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22185634404.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 20211112112123 its reverse (32121121111202), we get a palindrome (52332233223325).

The spelling of 20211112112123 in words is "twenty trillion, two hundred eleven billion, one hundred twelve million, one hundred twelve thousand, one hundred twenty-three".