21212221100101 has 8 divisors (see below), whose sum is σ = 22328774960000. Its totient is φ = 20095679357280.

The previous prime is 21212221100023. The next prime is 21212221100113. The reversal of 21212221100101 is 10100112221212.

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 21212221100101 - 2¹¹ = 21212221098053 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 (21212221100401) 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, 680596 + ... + 6548866.

It is an arithmetic number, because the mean of its divisors is an integer number (2791096870000).

Almost surely, 2^{21212221100101} is an apocalyptic number.

It is an amenable number.

21212221100101 is a deficient number, since it is larger than the sum of its proper divisors (1116553859899).

21212221100101 is a wasteful number, since it uses less digits than its factorization.

21212221100101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6058539.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21212221100101 its reverse (10100112221212), we get a palindrome (31312333321313).

The spelling of 21212221100101 in words is "twenty-one trillion, two hundred twelve billion, two hundred twenty-one million, one hundred thousand, one hundred one".