11111220122101 has 32 divisors (see below), whose sum is σ = 12890259772416. Its totient is φ = 9465581664000.

The previous prime is 11111220122087. The next prime is 11111220122179. The reversal of 11111220122101 is 10122102211111.

It is not a de Polignac number, because 11111220122101 - 2¹¹ = 11111220120053 is a prime.

It is a super-2 number, since 2×11111220122101² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111220822101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51244446 + ... + 51460816.

It is an arithmetic number, because the mean of its divisors is an integer number (402820617888).

Almost surely, 2^{11111220122101} is an apocalyptic number.

11111220122101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11111220122101 is a deficient number, since it is larger than the sum of its proper divisors (1779039650315).

11111220122101 is a wasteful number, since it uses less digits than its factorization.

11111220122101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217593.

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

Adding to 11111220122101 its reverse (10122102211111), we get a palindrome (21233322333212).

The spelling of 11111220122101 in words is "eleven trillion, one hundred eleven billion, two hundred twenty million, one hundred twenty-two thousand, one hundred one".