21211000000001 has 8 divisors (see below), whose sum is σ = 25667092437120. Its totient is φ = 17111394957888.

The previous prime is 21210999999997. The next prime is 21211000000013. The reversal of 21211000000001 is 10000000011212.

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

It is not a de Polignac number, because 21211000000001 - 2² = 21210999999997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21211000000031) 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 7 ways as a sum of consecutive naturals, for example, 89121848621 + ... + 89121848858.

It is an arithmetic number, because the mean of its divisors is an integer number (3208386554640).

Almost surely, 2^{21211000000001} is an apocalyptic number.

It is an amenable number.

21211000000001 is a deficient number, since it is larger than the sum of its proper divisors (4456092437119).

21211000000001 is a wasteful number, since it uses less digits than its factorization.

21211000000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178243697503.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 21211000000001 its reverse (10000000011212), we get a palindrome (31211000011213).

The spelling of 21211000000001 in words is "twenty-one trillion, two hundred eleven billion, one", and thus it is an aban number.