21212010100101 has 8 divisors (see below), whose sum is σ = 29047076893984. Its totient is φ = 13759141686480.

The previous prime is 21212010100097. The next prime is 21212010100201. The reversal of 21212010100101 is 10100101021212.

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

It is not a de Polignac number, because 21212010100101 - 2² = 21212010100097 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 (21212010100201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95549594935 + ... + 95549595156.

It is an arithmetic number, because the mean of its divisors is an integer number (3630884611748).

Almost surely, 2^{21212010100101} is an apocalyptic number.

It is an amenable number.

21212010100101 is a deficient number, since it is larger than the sum of its proper divisors (7835066793883).

21212010100101 is a wasteful number, since it uses less digits than its factorization.

21212010100101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191099190131.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21212010100101 its reverse (10100101021212), we get a palindrome (31312111121313).

The spelling of 21212010100101 in words is "twenty-one trillion, two hundred twelve billion, ten million, one hundred thousand, one hundred one".