21101100122012 has 36 divisors (see below), whose sum is σ = 38980742383800. Its totient is φ = 9993205148832.

The previous prime is 21101100121987. The next prime is 21101100122057. The reversal of 21101100122012 is 21022100110112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5544239 + ... + 8540537.

It is an arithmetic number, because the mean of its divisors is an integer number (1082798399550).

Almost surely, 2^{21101100122012} is an apocalyptic number.

It is an amenable number.

21101100122012 is a deficient number, since it is larger than the sum of its proper divisors (17879642261788).

21101100122012 is a wasteful number, since it uses less digits than its factorization.

21101100122012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3001218 (or 3001197 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21101100122012 its reverse (21022100110112), we get a palindrome (42123200232124).

The spelling of 21101100122012 in words is "twenty-one trillion, one hundred one billion, one hundred million, one hundred twenty-two thousand, twelve".