21202222223 has 16 divisors (see below), whose sum is σ = 26139563520. Its totient is φ = 16746764256.

The previous prime is 21202222213. The next prime is 21202222331. The reversal of 21202222223 is 32222220212.

It is a cyclic number.

It is not a de Polignac number, because 21202222223 - 2⁸ = 21202221967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21202222195 and 21202222204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202222213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145043 + ... + 251876.

It is an arithmetic number, because the mean of its divisors is an integer number (1633722720).

Almost surely, 2^21202222223 is an apocalyptic number.

21202222223 is a deficient number, since it is larger than the sum of its proper divisors (4937341297).

21202222223 is a wasteful number, since it uses less digits than its factorization.

21202222223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397526.

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 21202222223 its reverse (32222220212), we get a palindrome (53424442435).

The spelling of 21202222223 in words is "twenty-one billion, two hundred two million, two hundred twenty-two thousand, two hundred twenty-three".