1100021120001 has 32 divisors (see below), whose sum is σ = 1648822273920. Its totient is φ = 724762225152.

The previous prime is 1100021119927. The next prime is 1100021120057. The reversal of 1100021120001 is 1000211200011.

It is a happy number.

It is not a de Polignac number, because 1100021120001 - 2²⁷ = 1099886902273 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1100021120701) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 539181 + ... + 1578213.

It is an arithmetic number, because the mean of its divisors is an integer number (51525696060).

Almost surely, 2^{1100021120001} is an apocalyptic number.

It is an amenable number.

1100021120001 is a deficient number, since it is larger than the sum of its proper divisors (548801153919).

1100021120001 is a wasteful number, since it uses less digits than its factorization.

1100021120001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039502 (or 1039496 counting only the distinct ones).

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

Adding to 1100021120001 its reverse (1000211200011), we get a palindrome (2100232320012).

The spelling of 1100021120001 in words is "one trillion, one hundred billion, twenty-one million, one hundred twenty thousand, one".