21101001100102 has 64 divisors (see below), whose sum is σ = 40817534681088. Its totient is φ = 7939765764000.

The previous prime is 21101001100099. The next prime is 21101001100117. The reversal of 21101001100102 is 20100110010112.

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 31 ways as a sum of consecutive naturals, for example, 2156968 + ... + 6845035.

It is an arithmetic number, because the mean of its divisors is an integer number (637773979392).

Almost surely, 2^{21101001100102} is an apocalyptic number.

21101001100102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21101001100102 is a deficient number, since it is larger than the sum of its proper divisors (19716533580986).

21101001100102 is a wasteful number, since it uses less digits than its factorization.

21101001100102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9002545.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21101001100102 its reverse (20100110010112), we get a palindrome (41201111110214).

The spelling of 21101001100102 in words is "twenty-one trillion, one hundred one billion, one million, one hundred thousand, one hundred two".