21202221202112 has 28 divisors (see below), whose sum is σ = 42078755720400. Its totient is φ = 10599700075776.

The previous prime is 21202221202067. The next prime is 21202221202133. The reversal of 21202221202112 is 21120212220212.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21554612 + ... + 22516787.

It is an arithmetic number, because the mean of its divisors is an integer number (1502812704300).

Almost surely, 2^{21202221202112} is an apocalyptic number.

It is an amenable number.

21202221202112 is a deficient number, since it is larger than the sum of its proper divisors (20876534518288).

21202221202112 is an equidigital number, since it uses as much as digits as its factorization.

21202221202112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44078928 (or 44078918 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21202221202112 its reverse (21120212220212), we get a palindrome (42322433422324).

The spelling of 21202221202112 in words is "twenty-one trillion, two hundred two billion, two hundred twenty-one million, two hundred two thousand, one hundred twelve".