21102110100111 has 8 divisors (see below), whose sum is σ = 28896583200304. Its totient is φ = 13687855200000.

The previous prime is 21102110100041. The next prime is 21102110100119. The reversal of 21102110100111 is 11100101120112.

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

It is not a de Polignac number, because 21102110100111 - 2¹⁹ = 21102109575823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102110100119) 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, 95054549890 + ... + 95054550111.

It is an arithmetic number, because the mean of its divisors is an integer number (3612072900038).

Almost surely, 2^{21102110100111} is an apocalyptic number.

21102110100111 is a deficient number, since it is larger than the sum of its proper divisors (7794473100193).

21102110100111 is a wasteful number, since it uses less digits than its factorization.

21102110100111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190109100041.

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

Adding to 21102110100111 its reverse (11100101120112), we get a palindrome (32202211220223).

The spelling of 21102110100111 in words is "twenty-one trillion, one hundred two billion, one hundred ten million, one hundred thousand, one hundred eleven".