21212112100201 has 8 divisors (see below), whose sum is σ = 24146594011584. Its totient is φ = 18445314869520.

The previous prime is 21212112100159. The next prime is 21212112100211. The reversal of 21212112100201 is 10200121121212.

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

It is not a de Polignac number, because 21212112100201 - 2¹¹ = 21212112098153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21212112100211) 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, 41921169906 + ... + 41921170411.

It is an arithmetic number, because the mean of its divisors is an integer number (3018324251448).

Almost surely, 2^{21212112100201} is an apocalyptic number.

It is an amenable number.

21212112100201 is a deficient number, since it is larger than the sum of its proper divisors (2934481911383).

21212112100201 is a wasteful number, since it uses less digits than its factorization.

21212112100201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83842340351.

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

Adding to 21212112100201 its reverse (10200121121212), we get a palindrome (31412233221413).

The spelling of 21212112100201 in words is "twenty-one trillion, two hundred twelve billion, one hundred twelve million, one hundred thousand, two hundred one".