21111021100110 has 32 divisors (see below), whose sum is σ = 53333105938560. Its totient is φ = 5333310593568.

The previous prime is 21111021100097. The next prime is 21111021100111. The reversal of 21111021100110 is 1100112011112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111021100111) 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, 18518438992 + ... + 18518440131.

It is an arithmetic number, because the mean of its divisors is an integer number (1666659560580).

Almost surely, 2^{21111021100110} is an apocalyptic number.

21111021100110 is an abundant number, since it is smaller than the sum of its proper divisors (32222084838450).

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

21111021100110 is a wasteful number, since it uses less digits than its factorization.

21111021100110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37036879152.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 21111021100110 its reverse (1100112011112), we get a palindrome (22211133111222).

The spelling of 21111021100110 in words is "twenty-one trillion, one hundred eleven billion, twenty-one million, one hundred thousand, one hundred ten".