1111011101220 has 144 divisors (see below), whose sum is σ = 3213456079680. Its totient is φ = 286794902016.

The previous prime is 1111011101143. The next prime is 1111011101311. The reversal of 1111011101220 is 221011101111.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1111011101196 and 1111011101205.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16147251 + ... + 16215909.

It is an arithmetic number, because the mean of its divisors is an integer number (22315667220).

Almost surely, 2^{1111011101220} is an apocalyptic number.

1111011101220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1111011101220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1606728039840).

1111011101220 is an abundant number, since it is smaller than the sum of its proper divisors (2102444978460).

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

1111011101220 is a wasteful number, since it uses less digits than its factorization.

1111011101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68942 (or 68903 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 1111011101220 its reverse (221011101111), we get a palindrome (1332022202331).

The spelling of 1111011101220 in words is "one trillion, one hundred eleven billion, eleven million, one hundred one thousand, two hundred twenty".