21220210012112 has 40 divisors (see below), whose sum is σ = 42532723490400. Its totient is φ = 10244037706112.

The previous prime is 21220210012109. The next prime is 21220210012147. The reversal of 21220210012112 is 21121001202212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24660383 + ... + 25506369.

It is an arithmetic number, because the mean of its divisors is an integer number (1063318087260).

Almost surely, 2^{21220210012112} is an apocalyptic number.

It is an amenable number.

21220210012112 is an abundant number, since it is smaller than the sum of its proper divisors (21312513478288).

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

21220210012112 is a wasteful number, since it uses less digits than its factorization.

21220210012112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900083 (or 900077 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21220210012112 its reverse (21121001202212), we get a palindrome (42341211214324).

The spelling of 21220210012112 in words is "twenty-one trillion, two hundred twenty billion, two hundred ten million, twelve thousand, one hundred twelve".