10211211220111 has 4 divisors (see below), whose sum is σ = 11139503149224. Its totient is φ = 9282919291000.

The previous prime is 10211211220109. The next prime is 10211211220183. The reversal of 10211211220111 is 11102211211201.

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 10211211220111 - 2¹ = 10211211220109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10211211220411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 464145964540 + ... + 464145964561.

It is an arithmetic number, because the mean of its divisors is an integer number (2784875787306).

Almost surely, 2^{10211211220111} is an apocalyptic number.

10211211220111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

10211211220111 is a deficient number, since it is larger than the sum of its proper divisors (928291929113).

10211211220111 is an equidigital number, since it uses as much as digits as its factorization.

10211211220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928291929112.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 10211211220111 its reverse (11102211211201), we get a palindrome (21313422431312).

The spelling of 10211211220111 in words is "ten trillion, two hundred eleven billion, two hundred eleven million, two hundred twenty thousand, one hundred eleven".