21222210112002 has 64 divisors (see below), whose sum is σ = 50566695897600. Its totient is φ = 6573670421760.

The previous prime is 21222210111941. The next prime is 21222210112013. The reversal of 21222210112002 is 20021101222212.

It is a happy number.

21222210112002 is a `hidden beast` number, since 21 + 222 + 210 + 11 + 200 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 146243149 + ... + 146388192.

It is an arithmetic number, because the mean of its divisors is an integer number (790104623400).

Almost surely, 2^{21222210112002} is an apocalyptic number.

21222210112002 is an abundant number, since it is smaller than the sum of its proper divisors (29344485785598).

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

21222210112002 is a wasteful number, since it uses less digits than its factorization.

21222210112002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292631448 (or 292631442 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21222210112002 its reverse (20021101222212), we get a palindrome (41243311334214).

The spelling of 21222210112002 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred ten million, one hundred twelve thousand, two".