1011200100120 has 128 divisors (see below), whose sum is σ = 3852190886400. Its totient is φ = 231131449728.

The previous prime is 1011200100103. The next prime is 1011200100143. The reversal of 1011200100120 is 210010021101.

It is a happy number.

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

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66870754 + ... + 66885873.

It is an arithmetic number, because the mean of its divisors is an integer number (30095241300).

Almost surely, 2^{1011200100120} is an apocalyptic number.

1011200100120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011200100120 is an abundant number, since it is smaller than the sum of its proper divisors (2840990786280).

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

1011200100120 is a wasteful number, since it uses less digits than its factorization.

1011200100120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133756654 (or 133756644 counting only the distinct ones).

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

Adding to 1011200100120 its reverse (210010021101), we get a palindrome (1221210121221).

The spelling of 1011200100120 in words is "one trillion, eleven billion, two hundred million, one hundred thousand, one hundred twenty".