21222555522212 has 24 divisors (see below), whose sum is σ = 40516087261440. Its totient is φ = 9646544849760.

The previous prime is 21222555522169. The next prime is 21222555522229.

21222555522212 is nontrivially palindromic in base 10.

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, 4486253 + ... + 7910219.

It is an arithmetic number, because the mean of its divisors is an integer number (1688170302560).

Almost surely, 2^{21222555522212} is an apocalyptic number.

21222555522212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21222555522212 is a deficient number, since it is larger than the sum of its proper divisors (19293531739228).

21222555522212 is a wasteful number, since it uses less digits than its factorization.

21222555522212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3564851 (or 3564849 counting only the distinct ones).

The product of its digits is 160000, while the sum is 38.

It can be divided in two parts, 2122255 and 5522212, that added together give a palindrome (7644467).

The spelling of 21222555522212 in words is "twenty-one trillion, two hundred twenty-two billion, five hundred fifty-five million, five hundred twenty-two thousand, two hundred twelve".