1111122111220 has 24 divisors (see below), whose sum is σ = 2545479746208. Its totient is φ = 404044404000.

The previous prime is 1111122111149. The next prime is 1111122111221. The reversal of 1111122111220 is 221112211111.

It is a junction number, because it is equal to n+sod(n) for n = 1111122111194 and 1111122111203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111122111221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2525277306 + ... + 2525277745.

It is an arithmetic number, because the mean of its divisors is an integer number (106061656092).

Almost surely, 2^{1111122111220} is an apocalyptic number.

1111122111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111122111220 is an abundant number, since it is smaller than the sum of its proper divisors (1434357634988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1111122111220 is a wasteful number, since it uses less digits than its factorization.

1111122111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5050555071 (or 5050555069 counting only the distinct ones).

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

Adding to 1111122111220 its reverse (221112211111), we get a palindrome (1332234322331).

The spelling of 1111122111220 in words is "one trillion, one hundred eleven billion, one hundred twenty-two million, one hundred eleven thousand, two hundred twenty".