1011200100012 has 72 divisors (see below), whose sum is σ = 2655968187600. Its totient is φ = 336404321856.

The previous prime is 1011200100011. The next prime is 1011200100041. The reversal of 1011200100012 is 2100010021101.

It is a happy number.

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 = 1011200099967 and 1011200100003.

It is not an unprimeable number, because it can be changed into a prime (1011200100011) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 527187 + ... + 1516682.

It is an arithmetic number, because the mean of its divisors is an integer number (36888447050).

Almost surely, 2^{1011200100012} is an apocalyptic number.

1011200100012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1011200100012 is an abundant number, since it is smaller than the sum of its proper divisors (1644768087588).

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

1011200100012 is a wasteful number, since it uses less digits than its factorization.

1011200100012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2044397 (or 2044383 counting only the distinct ones).

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

Adding to 1011200100012 its reverse (2100010021101), we get a palindrome (3111210121113).

The spelling of 1011200100012 in words is "one trillion, eleven billion, two hundred million, one hundred thousand, twelve".