1001001100120 has 96 divisors (see below), whose sum is σ = 2620228964400. Its totient is φ = 343166084352.

The previous prime is 1001001100087. The next prime is 1001001100123. The reversal of 1001001100120 is 210011001001.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001001100123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26772559 + ... + 26809921.

Almost surely, 2^{1001001100120} is an apocalyptic number.

1001001100120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001001100120 is an abundant number, since it is smaller than the sum of its proper divisors (1619227864280).

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

1001001100120 is a wasteful number, since it uses less digits than its factorization.

1001001100120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51057 (or 51046 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 1001001100120 its reverse (210011001001), we get a palindrome (1211012101121).

The spelling of 1001001100120 in words is "one trillion, one billion, one million, one hundred thousand, one hundred twenty".