21100311102 has 32 divisors (see below), whose sum is σ = 45736320672. Its totient is φ = 6451046784.

The previous prime is 21100311101. The next prime is 21100311109. The reversal of 21100311102 is 20111300112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100311101) 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 15 ways as a sum of consecutive naturals, for example, 849273 + ... + 873764.

It is an arithmetic number, because the mean of its divisors is an integer number (1429260021).

Almost surely, 2^21100311102 is an apocalyptic number.

21100311102 is an abundant number, since it is smaller than the sum of its proper divisors (24636009570).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21100311102 is a wasteful number, since it uses less digits than its factorization.

21100311102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1723212.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 21100311102 its reverse (20111300112), we get a palindrome (41211611214).

The spelling of 21100311102 in words is "twenty-one billion, one hundred million, three hundred eleven thousand, one hundred two".