1111210021020 has 96 divisors (see below), whose sum is σ = 3394649502720. Its totient is φ = 269351868160.

The previous prime is 1111210021013. The next prime is 1111210021049. The reversal of 1111210021020 is 201200121111.

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 = 1111210020987 and 1111210021005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5640541 + ... + 5834219.

It is an arithmetic number, because the mean of its divisors is an integer number (35360932320).

Almost surely, 2^{1111210021020} is an apocalyptic number.

1111210021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111210021020 is an abundant number, since it is smaller than the sum of its proper divisors (2283439481700).

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

1111210021020 is a wasteful number, since it uses less digits than its factorization.

1111210021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202395 (or 202393 counting only the distinct ones).

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

Adding to 1111210021020 its reverse (201200121111), we get a palindrome (1312410142131).

The spelling of 1111210021020 in words is "one trillion, one hundred eleven billion, two hundred ten million, twenty-one thousand, twenty".