10111220212111 has 4 divisors (see below), whose sum is σ = 10111230290392. Its totient is φ = 10111210133832.

The previous prime is 10111220212099. The next prime is 10111220212153. The reversal of 10111220212111 is 11121202211101.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10111220212111 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 (10111220242111) 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, 3344205 + ... + 5604118.

It is an arithmetic number, because the mean of its divisors is an integer number (2527807572598).

Almost surely, 2^{10111220212111} is an apocalyptic number.

10111220212111 is a deficient number, since it is larger than the sum of its proper divisors (10078281).

10111220212111 is an equidigital number, since it uses as much as digits as its factorization.

10111220212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10078280.

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

Adding to 10111220212111 its reverse (11121202211101), we get a palindrome (21232422423212).

The spelling of 10111220212111 in words is "ten trillion, one hundred eleven billion, two hundred twenty million, two hundred twelve thousand, one hundred eleven".