21222134352 has 40 divisors (see below), whose sum is σ = 60915386880. Its totient is φ = 7074044640.

The previous prime is 21222134347. The next prime is 21222134369. The reversal of 21222134352 is 25343122212.

21222134352 is a `hidden beast` number, since 2 + 1 + 2 + 221 + 3 + 435 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24562224 + ... + 24563087.

It is an arithmetic number, because the mean of its divisors is an integer number (1522884672).

Almost surely, 2^21222134352 is an apocalyptic number.

It is an amenable number.

21222134352 is an abundant number, since it is smaller than the sum of its proper divisors (39693252528).

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

21222134352 is a wasteful number, since it uses less digits than its factorization.

21222134352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49125328 (or 49125316 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

Adding to 21222134352 its reverse (25343122212), we get a palindrome (46565256564).

The spelling of 21222134352 in words is "twenty-one billion, two hundred twenty-two million, one hundred thirty-four thousand, three hundred fifty-two".