21220211100002 has 16 divisors (see below), whose sum is σ = 31954513544280. Its totient is φ = 10568707473408.

The previous prime is 21220211099987. The next prime is 21220211100061. The reversal of 21220211100002 is 20000111202212.

It can be written as a sum of positive squares in 4 ways, for example, as 17788495604881 + 3431715495121 = 4217641^2 + 1852489^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21220211100002.

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, 68046578 + ... + 68357714.

Almost surely, 2^{21220211100002} is an apocalyptic number.

21220211100002 is a deficient number, since it is larger than the sum of its proper divisors (10734302444278).

21220211100002 is a wasteful number, since it uses less digits than its factorization.

21220211100002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444085.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21220211100002 its reverse (20000111202212), we get a palindrome (41220322302214).

The spelling of 21220211100002 in words is "twenty-one trillion, two hundred twenty billion, two hundred eleven million, one hundred thousand, two".