21101010102111 has 8 divisors (see below), whose sum is σ = 28136066367024. Its totient is φ = 14066646952640.

The previous prime is 21101010102091. The next prime is 21101010102169. The reversal of 21101010102111 is 11120101010112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21101010102111 - 2⁵ = 21101010102079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101010122111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173207820 + ... + 173329601.

It is an arithmetic number, because the mean of its divisors is an integer number (3517008295878).

Almost surely, 2^{21101010102111} is an apocalyptic number.

21101010102111 is a deficient number, since it is larger than the sum of its proper divisors (7035056264913).

21101010102111 is a wasteful number, since it uses less digits than its factorization.

21101010102111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346557721.

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

Adding to 21101010102111 its reverse (11120101010112), we get a palindrome (32221111112223).

The spelling of 21101010102111 in words is "twenty-one trillion, one hundred one billion, ten million, one hundred two thousand, one hundred eleven".