21722022213 has 32 divisors (see below), whose sum is σ = 30888130560. Its totient is φ = 13539052800.

The previous prime is 21722022211. The next prime is 21722022233. The reversal of 21722022213 is 31222022712.

It is not a de Polignac number, because 21722022213 - 2¹ = 21722022211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21722022211) 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 31 ways as a sum of consecutive naturals, for example, 5680020 + ... + 5683842.

It is an arithmetic number, because the mean of its divisors is an integer number (965254080).

Almost surely, 2^21722022213 is an apocalyptic number.

It is an amenable number.

21722022213 is a deficient number, since it is larger than the sum of its proper divisors (9166108347).

21722022213 is a wasteful number, since it uses less digits than its factorization.

21722022213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5129.

The product of its (nonzero) digits is 1344, while the sum is 24.

Adding to 21722022213 its reverse (31222022712), we get a palindrome (52944044925).

The spelling of 21722022213 in words is "twenty-one billion, seven hundred twenty-two million, twenty-two thousand, two hundred thirteen".