21110111102 has 32 divisors (see below), whose sum is σ = 32196938400. Its totient is φ = 10379796480.

The previous prime is 21110111083. The next prime is 21110111107. The reversal of 21110111102 is 20111101112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110111107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13860113 + ... + 13861635.

It is an arithmetic number, because the mean of its divisors is an integer number (1006154325).

Almost surely, 2^21110111102 is an apocalyptic number.

21110111102 is a deficient number, since it is larger than the sum of its proper divisors (11086827298).

21110111102 is a wasteful number, since it uses less digits than its factorization.

21110111102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2108.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 21110111102 its reverse (20111101112), we get a palindrome (41221212214).

The spelling of 21110111102 in words is "twenty-one billion, one hundred ten million, one hundred eleven thousand, one hundred two".