21112023112123 has 32 divisors (see below), whose sum is σ = 22246160440320. Its totient is φ = 20016792956160.

The previous prime is 21112023112009. The next prime is 21112023112157. The reversal of 21112023112123 is 32121132021112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21112023112123 - 2²¹ = 21112021014971 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21112023112094 and 21112023112103.

It is not an unprimeable number, because it can be changed into a prime (21112023112163) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1538433940 + ... + 1538447662.

It is an arithmetic number, because the mean of its divisors is an integer number (695192513760).

Almost surely, 2^{21112023112123} is an apocalyptic number.

21112023112123 is a deficient number, since it is larger than the sum of its proper divisors (1134137328197).

21112023112123 is a wasteful number, since it uses less digits than its factorization.

21112023112123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21907.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 21112023112123 its reverse (32121132021112), we get a palindrome (53233155133235).

The spelling of 21112023112123 in words is "twenty-one trillion, one hundred twelve billion, twenty-three million, one hundred twelve thousand, one hundred twenty-three".