21120102212 has 12 divisors (see below), whose sum is σ = 40320195216. Its totient is φ = 9600046440.

The previous prime is 21120102209. The next prime is 21120102217. The reversal of 21120102212 is 21220102112.

It is not an unprimeable number, because it can be changed into a prime (21120102217) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 240001118 + ... + 240001205.

It is an arithmetic number, because the mean of its divisors is an integer number (3360016268).

Almost surely, 2^21120102212 is an apocalyptic number.

21120102212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21120102212 is a deficient number, since it is larger than the sum of its proper divisors (19200093004).

21120102212 is a wasteful number, since it uses less digits than its factorization.

21120102212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480002338 (or 480002336 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21120102212 its reverse (21220102112), we get a palindrome (42340204324).

The spelling of 21120102212 in words is "twenty-one billion, one hundred twenty million, one hundred two thousand, two hundred twelve".