10111220122111 has 4 divisors (see below), whose sum is σ = 10115302167432. Its totient is φ = 10107138076792.

The previous prime is 10111220122001. The next prime is 10111220122123. The reversal of 10111220122111 is 11122102211101.

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 10111220122111 - 2⁹ = 10111220121599 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 (10111220122411) 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, 2041018945 + ... + 2041023898.

It is an arithmetic number, because the mean of its divisors is an integer number (2528825541858).

Almost surely, 2^{10111220122111} is an apocalyptic number.

10111220122111 is a deficient number, since it is larger than the sum of its proper divisors (4082045321).

10111220122111 is an equidigital number, since it uses as much as digits as its factorization.

10111220122111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4082045320.

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

Adding to 10111220122111 its reverse (11122102211101), we get a palindrome (21233322333212).

The spelling of 10111220122111 in words is "ten trillion, one hundred eleven billion, two hundred twenty million, one hundred twenty-two thousand, one hundred eleven".