21112221100101 has 8 divisors (see below), whose sum is σ = 28910428893984. Its totient is φ = 13694413686480.

The previous prime is 21112221100063. The next prime is 21112221100109. The reversal of 21112221100101 is 10100112221112.

It is a happy number.

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

It is not a de Polignac number, because 21112221100101 - 2¹⁷ = 21112220969029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112221100109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95100094935 + ... + 95100095156.

It is an arithmetic number, because the mean of its divisors is an integer number (3613803611748).

Almost surely, 2^{21112221100101} is an apocalyptic number.

It is an amenable number.

21112221100101 is a deficient number, since it is larger than the sum of its proper divisors (7798207793883).

21112221100101 is a wasteful number, since it uses less digits than its factorization.

21112221100101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190200190131.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21112221100101 its reverse (10100112221112), we get a palindrome (31212333321213).

The spelling of 21112221100101 in words is "twenty-one trillion, one hundred twelve billion, two hundred twenty-one million, one hundred thousand, one hundred one".