21102112111101 has 8 divisors (see below), whose sum is σ = 32155599407424. Its totient is φ = 12058349777760.

The previous prime is 21102112111099. The next prime is 21102112111103. The reversal of 21102112111101 is 10111121120112.

It is an interprime number because it is at equal distance from previous prime (21102112111099) and next prime (21102112111103).

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

It is not a de Polignac number, because 21102112111101 - 2¹ = 21102112111099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102112111103) 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, 502431240720 + ... + 502431240761.

It is an arithmetic number, because the mean of its divisors is an integer number (4019449925928).

Almost surely, 2^{21102112111101} is an apocalyptic number.

21102112111101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21102112111101 is a deficient number, since it is larger than the sum of its proper divisors (11053487296323).

21102112111101 is a wasteful number, since it uses less digits than its factorization.

21102112111101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004862481491.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 21102112111101 its reverse (10111121120112), we get a palindrome (31213233231213).

The spelling of 21102112111101 in words is "twenty-one trillion, one hundred two billion, one hundred twelve million, one hundred eleven thousand, one hundred one".