21222944289 has 12 divisors (see below), whose sum is σ = 30656969616. Its totient is φ = 14147888472.

The previous prime is 21222944287. The next prime is 21222944291. The reversal of 21222944289 is 98244922212.

21222944289 is a `hidden beast` number, since 2 + 122 + 2 + 9 + 442 + 89 = 666.

It is an interprime number because it is at equal distance from previous prime (21222944287) and next prime (21222944291).

It is not a de Polignac number, because 21222944289 - 2¹ = 21222944287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21222944287) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 162474 + ... + 262380.

It is an arithmetic number, because the mean of its divisors is an integer number (2554747468).

Almost surely, 2^21222944289 is an apocalyptic number.

It is an amenable number.

21222944289 is a deficient number, since it is larger than the sum of its proper divisors (9434025327).

21222944289 is a wasteful number, since it uses less digits than its factorization.

21222944289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123516 (or 123513 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The spelling of 21222944289 in words is "twenty-one billion, two hundred twenty-two million, nine hundred forty-four thousand, two hundred eighty-nine".