21102101012111 has 8 divisors (see below), whose sum is σ = 24142425071520. Its totient is φ = 18068211502848.

The previous prime is 21102101012071. The next prime is 21102101012119. The reversal of 21102101012111 is 11121010120112.

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 21102101012111 - 2²² = 21102096817807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102101012119) 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, 1608630506 + ... + 1608643623.

It is an arithmetic number, because the mean of its divisors is an integer number (3017803133940).

Almost surely, 2^{21102101012111} is an apocalyptic number.

21102101012111 is a deficient number, since it is larger than the sum of its proper divisors (3040324059409).

21102101012111 is an equidigital number, since it uses as much as digits as its factorization.

21102101012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3217275073.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21102101012111 its reverse (11121010120112), we get a palindrome (32223111132223).

The spelling of 21102101012111 in words is "twenty-one trillion, one hundred two billion, one hundred one million, twelve thousand, one hundred eleven".