21001201000211 has 8 divisors (see below), whose sum is σ = 21679232200704. Its totient is φ = 20323205618760.

The previous prime is 21001201000207. The next prime is 21001201000217. The reversal of 21001201000211 is 11200010210012.

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 21001201000211 - 2² = 21001201000207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21001201000192 and 21001201000201.

It is not an unprimeable number, because it can be changed into a prime (21001201000217) 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, 7760675 + ... + 10110908.

It is an arithmetic number, because the mean of its divisors is an integer number (2709904025088).

Almost surely, 2^{21001201000211} is an apocalyptic number.

21001201000211 is a deficient number, since it is larger than the sum of its proper divisors (678031200493).

21001201000211 is a wasteful number, since it uses less digits than its factorization.

21001201000211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17909521.

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

Adding to 21001201000211 its reverse (11200010210012), we get a palindrome (32201211210223).

The spelling of 21001201000211 in words is "twenty-one trillion, one billion, two hundred one million, two hundred eleven", and thus it is an aban number.