1111223031020 has 12 divisors (see below), whose sum is σ = 2333568365184. Its totient is φ = 444489212400.

The previous prime is 1111223031001. The next prime is 1111223031049. The reversal of 1111223031020 is 201303221111.

It is a self number, because there is not a number n which added to its sum of digits gives 1111223031020.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27780575756 + ... + 27780575795.

It is an arithmetic number, because the mean of its divisors is an integer number (194464030432).

Almost surely, 2^{1111223031020} is an apocalyptic number.

1111223031020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111223031020 is an abundant number, since it is smaller than the sum of its proper divisors (1222345334164).

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

1111223031020 is a wasteful number, since it uses less digits than its factorization.

1111223031020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55561151560 (or 55561151558 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1111223031020 its reverse (201303221111), we get a palindrome (1312526252131).

The spelling of 1111223031020 in words is "one trillion, one hundred eleven billion, two hundred twenty-three million, thirty-one thousand, twenty".