21000212200001 has 8 divisors (see below), whose sum is σ = 22012701162144. Its totient is φ = 20011546507680.

The previous prime is 21000212199971. The next prime is 21000212200043. The reversal of 21000212200001 is 10000221200012.

It is a happy number.

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 21000212200001 - 2³⁴ = 20983032330817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21000212200301) 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, 5955815651 + ... + 5955819176.

It is an arithmetic number, because the mean of its divisors is an integer number (2751587645268).

Almost surely, 2^{21000212200001} is an apocalyptic number.

It is an amenable number.

21000212200001 is a deficient number, since it is larger than the sum of its proper divisors (1012488962143).

21000212200001 is a wasteful number, since it uses less digits than its factorization.

21000212200001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11911634911.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21000212200001 its reverse (10000221200012), we get a palindrome (31000433400013).

The spelling of 21000212200001 in words is "twenty-one trillion, two hundred twelve million, two hundred thousand, one".