1112001001020 has 540 divisors, whose sum is σ = 4394133269064. Its totient is φ = 234617160960.

The previous prime is 1112001001003. The next prime is 1112001001057. The reversal of 1112001001020 is 201001002111.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (540).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1112001000993 and 1112001001011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 179 ways as a sum of consecutive naturals, for example, 13373775 + ... + 13456665.

Almost surely, 2^{1112001001020} is an apocalyptic number.

1112001001020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1112001001020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2197066634532).

1112001001020 is an abundant number, since it is smaller than the sum of its proper divisors (3282132268044).

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

1112001001020 is a wasteful number, since it uses less digits than its factorization.

1112001001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82952 (or 82921 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1112001001020 its reverse (201001002111), we get a palindrome (1313002003131).

The spelling of 1112001001020 in words is "one trillion, one hundred twelve billion, one million, one thousand, twenty".