21101020021102 has 32 divisors (see below), whose sum is σ = 37442272835520. Its totient is φ = 8726382792960.

The previous prime is 21101020021097. The next prime is 21101020021121. The reversal of 21101020021102 is 20112002010112.

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 15 ways as a sum of consecutive naturals, for example, 14400913 + ... + 15798364.

It is an arithmetic number, because the mean of its divisors is an integer number (1170071026110).

Almost surely, 2^{21101020021102} is an apocalyptic number.

21101020021102 is a deficient number, since it is larger than the sum of its proper divisors (16341252814418).

21101020021102 is a wasteful number, since it uses less digits than its factorization.

21101020021102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30201036.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21101020021102 its reverse (20112002010112), we get a palindrome (41213022031214).

The spelling of 21101020021102 in words is "twenty-one trillion, one hundred one billion, twenty million, twenty-one thousand, one hundred two".