21202000112123 has 4 divisors (see below), whose sum is σ = 21224822502840. Its totient is φ = 21179177721408.

The previous prime is 21202000112101. The next prime is 21202000112131. The reversal of 21202000112123 is 32121100020212.

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 21202000112123 - 2⁸ = 21202000111867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21202000192123) 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, 11411193965 + ... + 11411195822.

It is an arithmetic number, because the mean of its divisors is an integer number (5306205625710).

Almost surely, 2^{21202000112123} is an apocalyptic number.

21202000112123 is a deficient number, since it is larger than the sum of its proper divisors (22822390717).

21202000112123 is an equidigital number, since it uses as much as digits as its factorization.

21202000112123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22822390716.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21202000112123 its reverse (32121100020212), we get a palindrome (53323100132335).

The spelling of 21202000112123 in words is "twenty-one trillion, two hundred two billion, one hundred twelve thousand, one hundred twenty-three".