21422213213 has 16 divisors (see below), whose sum is σ = 22820616000. Its totient is φ = 20039520000.

The previous prime is 21422213209. The next prime is 21422213227. The reversal of 21422213213 is 31231222412.

It is a cyclic number.

It is not a de Polignac number, because 21422213213 - 2² = 21422213209 is a prime.

It is a super-2 number, since 2×21422213213² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21422216213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2124203 + ... + 2134263.

It is an arithmetic number, because the mean of its divisors is an integer number (1426288500).

Almost surely, 2^21422213213 is an apocalyptic number.

It is an amenable number.

21422213213 is a deficient number, since it is larger than the sum of its proper divisors (1398402787).

21422213213 is a wasteful number, since it uses less digits than its factorization.

21422213213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10828.

The product of its digits is 1152, while the sum is 23.

Adding to 21422213213 its reverse (31231222412), we get a palindrome (52653435625).

The spelling of 21422213213 in words is "twenty-one billion, four hundred twenty-two million, two hundred thirteen thousand, two hundred thirteen".