21222202103 has 4 divisors (see below), whose sum is σ = 21268640640. Its totient is φ = 21175763568.

The previous prime is 21222202087. The next prime is 21222202109. The reversal of 21222202103 is 30120222212.

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 21222202103 - 2⁴ = 21222202087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222202109) 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, 23218583 + ... + 23219496.

It is an arithmetic number, because the mean of its divisors is an integer number (5317160160).

Almost surely, 2^21222202103 is an apocalyptic number.

21222202103 is a deficient number, since it is larger than the sum of its proper divisors (46438537).

21222202103 is an equidigital number, since it uses as much as digits as its factorization.

21222202103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46438536.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21222202103 its reverse (30120222212), we get a palindrome (51342424315).

The spelling of 21222202103 in words is "twenty-one billion, two hundred twenty-two million, two hundred two thousand, one hundred three".