21221220001112 has 32 divisors (see below), whose sum is σ = 42094459200000. Its totient is φ = 10001643477408.

The previous prime is 21221220001109. The next prime is 21221220001127. The reversal of 21221220001112 is 21110002212212.

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, 350756912 + ... + 350817407.

It is an arithmetic number, because the mean of its divisors is an integer number (1315451850000).

Almost surely, 2^{21221220001112} is an apocalyptic number.

It is an amenable number.

21221220001112 is a deficient number, since it is larger than the sum of its proper divisors (20873239198888).

21221220001112 is a wasteful number, since it uses less digits than its factorization.

21221220001112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701574543 (or 701574539 counting only the distinct ones).

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

Adding to 21221220001112 its reverse (21110002212212), we get a palindrome (42331222213324).

The spelling of 21221220001112 in words is "twenty-one trillion, two hundred twenty-one billion, two hundred twenty million, one thousand, one hundred twelve".