21101020021110 has 64 divisors (see below), whose sum is σ = 54421735306752. Its totient is φ = 5216898356736.

The previous prime is 21101020021097. The next prime is 21101020021121. The reversal of 21101020021110 is 1112002010112.

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, 308731122 + ... + 308799461.

It is an arithmetic number, because the mean of its divisors is an integer number (850339614168).

Almost surely, 2^{21101020021110} is an apocalyptic number.

21101020021110 is an abundant number, since it is smaller than the sum of its proper divisors (33320715285642).

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

21101020021110 is a wasteful number, since it uses less digits than its factorization.

21101020021110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617530677.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21101020021110 its reverse (1112002010112), we get a palindrome (22213022031222).

The spelling of 21101020021110 in words is "twenty-one trillion, one hundred one billion, twenty million, twenty-one thousand, one hundred ten".