11111210020020 has 96 divisors (see below), whose sum is σ = 33953110765056. Its totient is φ = 2692562012800.

The previous prime is 11111210020019. The next prime is 11111210020037. The reversal of 11111210020020 is 2002001211111.

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 = 11111210019978 and 11111210020005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1655334 + ... + 4996253.

It is an arithmetic number, because the mean of its divisors is an integer number (353678237136).

Almost surely, 2^{11111210020020} is an apocalyptic number.

11111210020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11111210020020 is an abundant number, since it is smaller than the sum of its proper divisors (22841900745036).

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

11111210020020 is a wasteful number, since it uses less digits than its factorization.

11111210020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6654141 (or 6654139 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11111210020020 its reverse (2002001211111), we get a palindrome (13113211231131).

The spelling of 11111210020020 in words is "eleven trillion, one hundred eleven billion, two hundred ten million, twenty thousand, twenty".