21202111000001 has 8 divisors (see below), whose sum is σ = 21365405570880. Its totient is φ = 21039248998768.

The previous prime is 21202110999959. The next prime is 21202111000039. The reversal of 21202111000001 is 10000011120212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21202111000001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21208111000001) 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, 108044006 + ... + 108240063.

It is an arithmetic number, because the mean of its divisors is an integer number (2670675696360).

Almost surely, 2^{21202111000001} is an apocalyptic number.

It is an amenable number.

21202111000001 is a deficient number, since it is larger than the sum of its proper divisors (163294570879).

21202111000001 is a wasteful number, since it uses less digits than its factorization.

21202111000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216284823.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21202111000001 its reverse (10000011120212), we get a palindrome (31202122120213).

The spelling of 21202111000001 in words is "twenty-one trillion, two hundred two billion, one hundred eleven million, one", and thus it is an aban number.