21222213202 has 16 divisors (see below), whose sum is σ = 32056015680. Its totient is φ = 10537116208.

The previous prime is 21222213161. The next prime is 21222213241. The reversal of 21222213202 is 20231222212.

It is a super-2 number, since 2×21222213202² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21222213202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116523 + ... + 236689.

It is an arithmetic number, because the mean of its divisors is an integer number (2003500980).

Almost surely, 2^21222213202 is an apocalyptic number.

21222213202 is a deficient number, since it is larger than the sum of its proper divisors (10833802478).

21222213202 is a wasteful number, since it uses less digits than its factorization.

21222213202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120785.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21222213202 its reverse (20231222212), we get a palindrome (41453435414).

The spelling of 21222213202 in words is "twenty-one billion, two hundred twenty-two million, two hundred thirteen thousand, two hundred two".