10001211121211 has 4 divisors (see below), whose sum is σ = 10001234941800. Its totient is φ = 10001187300624.

The previous prime is 10001211121207. The next prime is 10001211121229. The reversal of 10001211121211 is 11212111210001.

10001211121211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10001211121211 - 2² = 10001211121207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10001211121241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11269001 + ... + 12124058.

It is an arithmetic number, because the mean of its divisors is an integer number (2500308735450).

Almost surely, 2^{10001211121211} is an apocalyptic number.

10001211121211 is a deficient number, since it is larger than the sum of its proper divisors (23820589).

10001211121211 is an equidigital number, since it uses as much as digits as its factorization.

10001211121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23820588.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 10001211121211 its reverse (11212111210001), we get a palindrome (21213322331212).

The spelling of 10001211121211 in words is "ten trillion, one billion, two hundred eleven million, one hundred twenty-one thousand, two hundred eleven".