21222202110023 has 4 divisors (see below), whose sum is σ = 21222212150880. Its totient is φ = 21222192069168.

The previous prime is 21222202110001. The next prime is 21222202110049. The reversal of 21222202110023 is 32001120222212.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21222202110023 - 2⁶ = 21222202109959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21222202109977 and 21222202110004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222202140023) 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, 483215 + ... + 6532832.

It is an arithmetic number, because the mean of its divisors is an integer number (5305553037720).

Almost surely, 2^{21222202110023} is an apocalyptic number.

21222202110023 is a deficient number, since it is larger than the sum of its proper divisors (10040857).

21222202110023 is an equidigital number, since it uses as much as digits as its factorization.

21222202110023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10040856.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21222202110023 its reverse (32001120222212), we get a palindrome (53223322332235).

The spelling of 21222202110023 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred two million, one hundred ten thousand, twenty-three".