21222211160203 has 4 divisors (see below), whose sum is σ = 21224961227680. Its totient is φ = 21219461092728.

The previous prime is 21222211160197. The next prime is 21222211160317. The reversal of 21222211160203 is 30206111222212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21222211160203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222211160503) 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, 1375022163 + ... + 1375037596.

It is an arithmetic number, because the mean of its divisors is an integer number (5306240306920).

Almost surely, 2^{21222211160203} is an apocalyptic number.

21222211160203 is a deficient number, since it is larger than the sum of its proper divisors (2750067477).

21222211160203 is an equidigital number, since it uses as much as digits as its factorization.

21222211160203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2750067476.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 21222211160203 its reverse (30206111222212), we get a palindrome (51428322382415).

The spelling of 21222211160203 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred eleven million, one hundred sixty thousand, two hundred three".