21212200010001 has 64 divisors (see below), whose sum is σ = 39000620445696. Its totient is φ = 9896773881600.

The previous prime is 21212200009963. The next prime is 21212200010083. The reversal of 21212200010001 is 10001000221212.

It is not a de Polignac number, because 21212200010001 - 2⁶ = 21212200009937 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21212200011001) 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 63 ways as a sum of consecutive naturals, for example, 95343885 + ... + 95566106.

It is an arithmetic number, because the mean of its divisors is an integer number (609384694464).

Almost surely, 2^{21212200010001} is an apocalyptic number.

21212200010001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21212200010001 is a deficient number, since it is larger than the sum of its proper divisors (17788420435695).

21212200010001 is a wasteful number, since it uses less digits than its factorization.

21212200010001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190910062.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21212200010001 its reverse (10001000221212), we get a palindrome (31213200231213).

The spelling of 21212200010001 in words is "twenty-one trillion, two hundred twelve billion, two hundred million, ten thousand, one".