1111021200020 has 12 divisors (see below), whose sum is σ = 2333144520084. Its totient is φ = 444408480000.

The previous prime is 1111021200017. The next prime is 1111021200059. The reversal of 1111021200020 is 200021201111.

It can be written as a sum of positive squares in 2 ways, for example, as 879510103684 + 231511096336 = 937822^2 + 481156^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1111021199974 and 1111021200010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27775529981 + ... + 27775530020.

It is an arithmetic number, because the mean of its divisors is an integer number (194428710007).

Almost surely, 2^{1111021200020} is an apocalyptic number.

1111021200020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111021200020 is an abundant number, since it is smaller than the sum of its proper divisors (1222123320064).

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

1111021200020 is a wasteful number, since it uses less digits than its factorization.

1111021200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55551060010 (or 55551060008 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1111021200020 its reverse (200021201111), we get a palindrome (1311042401131).

The spelling of 1111021200020 in words is "one trillion, one hundred eleven billion, twenty-one million, two hundred thousand, twenty".