21222000213 has 4 divisors (see below), whose sum is σ = 28296000288. Its totient is φ = 14148000140.

The previous prime is 21222000209. The next prime is 21222000251. The reversal of 21222000213 is 31200022212.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21222000213 - 2² = 21222000209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21222000192 and 21222000201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222000253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3537000033 + ... + 3537000038.

It is an arithmetic number, because the mean of its divisors is an integer number (7074000072).

Almost surely, 2^21222000213 is an apocalyptic number.

It is an amenable number.

21222000213 is a deficient number, since it is larger than the sum of its proper divisors (7074000075).

21222000213 is an equidigital number, since it uses as much as digits as its factorization.

21222000213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7074000074.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21222000213 its reverse (31200022212), we get a palindrome (52422022425).

The spelling of 21222000213 in words is "twenty-one billion, two hundred twenty-two million, two hundred thirteen", and thus it is an aban number.