21222213130201 has 4 divisors (see below), whose sum is σ = 21222223070004. Its totient is φ = 21222203190400.

The previous prime is 21222213130193. The next prime is 21222213130253. The reversal of 21222213130201 is 10203131222212.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 17482433440000 + 3739779690201 = 4181200^2 + 1933851^2 .

It is a cyclic number.

It is not a de Polignac number, because 21222213130201 - 2³ = 21222213130193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222213130801) 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, 312340 + ... + 6522421.

It is an arithmetic number, because the mean of its divisors is an integer number (5305555767501).

Almost surely, 2^{21222213130201} is an apocalyptic number.

It is an amenable number.

21222213130201 is a deficient number, since it is larger than the sum of its proper divisors (9939803).

21222213130201 is an equidigital number, since it uses as much as digits as its factorization.

21222213130201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9939802.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21222213130201 its reverse (10203131222212), we get a palindrome (31425344352413).

The spelling of 21222213130201 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred thirteen million, one hundred thirty thousand, two hundred one".