10001221102111 has 4 divisors (see below), whose sum is σ = 10001283178824. Its totient is φ = 10001159025400.

The previous prime is 10001221102109. The next prime is 10001221102177. The reversal of 10001221102111 is 11120112210001.

It is a happy number.

10001221102111 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 10001221102111 - 2¹ = 10001221102109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10001221102091 and 10001221102100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001221102511) 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, 30796060 + ... + 31119121.

It is an arithmetic number, because the mean of its divisors is an integer number (2500320794706).

Almost surely, 2^{10001221102111} is an apocalyptic number.

10001221102111 is a deficient number, since it is larger than the sum of its proper divisors (62076713).

10001221102111 is an equidigital number, since it uses as much as digits as its factorization.

10001221102111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62076712.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 10001221102111 its reverse (11120112210001), we get a palindrome (21121333312112).

The spelling of 10001221102111 in words is "ten trillion, one billion, two hundred twenty-one million, one hundred two thousand, one hundred eleven".