21202112201123 has 8 divisors (see below), whose sum is σ = 24233827118592. Its totient is φ = 18171107720136.

The previous prime is 21202112201113. The next prime is 21202112201129. The reversal of 21202112201123 is 32110221120212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21202112201123 - 2³⁴ = 21184932331939 is a prime.

It is a super-2 number, since 2×21202112201123² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21202112201095 and 21202112201104.

It is not an unprimeable number, because it can be changed into a prime (21202112201129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177545165 + ... + 177664542.

It is an arithmetic number, because the mean of its divisors is an integer number (3029228389824).

Almost surely, 2^{21202112201123} is an apocalyptic number.

21202112201123 is a deficient number, since it is larger than the sum of its proper divisors (3031714917469).

21202112201123 is an equidigital number, since it uses as much as digits as its factorization.

21202112201123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355218241.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 21202112201123 its reverse (32110221120212), we get a palindrome (53312333321335).

The spelling of 21202112201123 in words is "twenty-one trillion, two hundred two billion, one hundred twelve million, two hundred one thousand, one hundred twenty-three".