11101111001020 has 24 divisors (see below), whose sum is σ = 23312396213568. Its totient is φ = 4440432379200.

The previous prime is 11101111000957. The next prime is 11101111001129. The reversal of 11101111001020 is 2010011110111.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 11101111000988 and 11101111001006.

It is a congruent number.

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, 12659590 + ... + 13508050.

It is an arithmetic number, because the mean of its divisors is an integer number (971349842232).

Almost surely, 2^{11101111001020} is an apocalyptic number.

11101111001020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11101111001020 is an abundant number, since it is smaller than the sum of its proper divisors (12211285212548).

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

11101111001020 is a wasteful number, since it uses less digits than its factorization.

11101111001020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1502661 (or 1502659 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 11101111001020 its reverse (2010011110111), we get a palindrome (13111122111131).

The spelling of 11101111001020 in words is "eleven trillion, one hundred one billion, one hundred eleven million, one thousand, twenty".