11111031020 has 24 divisors (see below), whose sum is σ = 24705705024. Its totient is φ = 4182976256.

The previous prime is 11111031011. The next prime is 11111031031. The reversal of 11111031020 is 2013011111.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 11111030992 and 11111031010.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16339412 + ... + 16340091.

It is an arithmetic number, because the mean of its divisors is an integer number (1029404376).

Almost surely, 2^11111031020 is an apocalyptic number.

11111031020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11111031020 is an abundant number, since it is smaller than the sum of its proper divisors (13594674004).

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

11111031020 is a wasteful number, since it uses less digits than its factorization.

11111031020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32679529 (or 32679527 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 11.

Adding to 11111031020 its reverse (2013011111), we get a palindrome (13124042131).

The spelling of 11111031020 in words is "eleven billion, one hundred eleven million, thirty-one thousand, twenty".