21022223100203 has 4 divisors (see below), whose sum is σ = 22639317184848. Its totient is φ = 19405129015560.

The previous prime is 21022223100187. The next prime is 21022223100217. The reversal of 21022223100203 is 30200132222012.

It is a happy number.

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 21022223100203 - 2⁴ = 21022223100187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21022223100293) 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, 808547042303 + ... + 808547042328.

It is an arithmetic number, because the mean of its divisors is an integer number (5659829296212).

Almost surely, 2^{21022223100203} is an apocalyptic number.

21022223100203 is a deficient number, since it is larger than the sum of its proper divisors (1617094084645).

21022223100203 is a wasteful number, since it uses less digits than its factorization.

21022223100203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1617094084644.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21022223100203 its reverse (30200132222012), we get a palindrome (51222355322215).

The spelling of 21022223100203 in words is "twenty-one trillion, twenty-two billion, two hundred twenty-three million, one hundred thousand, two hundred three".