21112100021101 has 8 divisors (see below), whose sum is σ = 21379487915520. Its totient is φ = 20844715779888.

The previous prime is 21112100021063. The next prime is 21112100021107. The reversal of 21112100021101 is 10112000121112.

It is a happy number.

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 21112100021101 - 2¹⁵ = 21112099988333 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 (21112100021107) 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, 11838300 + ... + 13504426.

It is an arithmetic number, because the mean of its divisors is an integer number (2672435989440).

Almost surely, 2^{21112100021101} is an apocalyptic number.

It is an amenable number.

21112100021101 is a deficient number, since it is larger than the sum of its proper divisors (267387894419).

21112100021101 is a wasteful number, since it uses less digits than its factorization.

21112100021101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1826603.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21112100021101 its reverse (10112000121112), we get a palindrome (31224100142213).

The spelling of 21112100021101 in words is "twenty-one trillion, one hundred twelve billion, one hundred million, twenty-one thousand, one hundred one".