21120102221012 has 24 divisors (see below), whose sum is σ = 36983929449600. Its totient is φ = 10553267419136.

The previous prime is 21120102221003. The next prime is 21120102221039. The reversal of 21120102221012 is 21012220102112.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 38865893 + ... + 39405555.

It is an arithmetic number, because the mean of its divisors is an integer number (1540997060400).

Almost surely, 2^{21120102221012} is an apocalyptic number.

It is an amenable number.

21120102221012 is a deficient number, since it is larger than the sum of its proper divisors (15863827228588).

21120102221012 is a wasteful number, since it uses less digits than its factorization.

21120102221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545935 (or 545933 counting only the distinct ones).

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

Adding to 21120102221012 its reverse (21012220102112), we get a palindrome (42132322323124).

The spelling of 21120102221012 in words is "twenty-one trillion, one hundred twenty billion, one hundred two million, two hundred twenty-one thousand, twelve".