21422101224 has 32 divisors (see below), whose sum is σ = 53752890240. Its totient is φ = 7114348800.

The previous prime is 21422101223. The next prime is 21422101229. The reversal of 21422101224 is 42210122412.

It is a self number, because there is not a number n which added to its sum of digits gives 21422101224.

It is not an unprimeable number, because it can be changed into a prime (21422101223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1640337 + ... + 1653344.

It is an arithmetic number, because the mean of its divisors is an integer number (1679777820).

Almost surely, 2^21422101224 is an apocalyptic number.

21422101224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21422101224 is an abundant number, since it is smaller than the sum of its proper divisors (32330789016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21422101224 is a wasteful number, since it uses less digits than its factorization.

21422101224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3293961 (or 3293957 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 21422101224 its reverse (42210122412), we get a palindrome (63632223636).

The spelling of 21422101224 in words is "twenty-one billion, four hundred twenty-two million, one hundred one thousand, two hundred twenty-four".