21222005051412 has 72 divisors (see below), whose sum is σ = 58531778559072. Its totient is φ = 6429757665600.

The previous prime is 21222005051411. The next prime is 21222005051419. The reversal of 21222005051412 is 21415050022212.

21222005051412 is a `hidden beast` number, since 2 + 12 + 2 + 2 + 0 + 0 + 505 + 141 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222005051411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2591118 + ... + 7011269.

It is an arithmetic number, because the mean of its divisors is an integer number (812941368876).

Almost surely, 2^{21222005051412} is an apocalyptic number.

21222005051412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21222005051412 is an abundant number, since it is smaller than the sum of its proper divisors (37309773507660).

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

21222005051412 is a wasteful number, since it uses less digits than its factorization.

21222005051412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9607989 (or 9607984 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

Adding to 21222005051412 its reverse (21415050022212), we get a palindrome (42637055073624).

The spelling of 21222005051412 in words is "twenty-one trillion, two hundred twenty-two billion, five million, fifty-one thousand, four hundred twelve".