21100220121110 has 32 divisors (see below), whose sum is σ = 41107502721600. Its totient is φ = 7751700494208.

The previous prime is 21100220121077. The next prime is 21100220121137. The reversal of 21100220121110 is 1112102200112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 407786657 + ... + 407838396.

It is an arithmetic number, because the mean of its divisors is an integer number (1284609460050).

Almost surely, 2^{21100220121110} is an apocalyptic number.

21100220121110 is a deficient number, since it is larger than the sum of its proper divisors (20007282600490).

21100220121110 is a wasteful number, since it uses less digits than its factorization.

21100220121110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815625272.

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

Adding to 21100220121110 its reverse (1112102200112), we get a palindrome (22212322321222).

The spelling of 21100220121110 in words is "twenty-one trillion, one hundred billion, two hundred twenty million, one hundred twenty-one thousand, one hundred ten".