1100021001001 has 16 divisors (see below), whose sum is σ = 1199054256400. Its totient is φ = 1003102507008.

The previous prime is 1100021000971. The next prime is 1100021001029. The reversal of 1100021001001 is 1001001200011.

It can be written as a sum of positive squares in 8 ways, for example, as 10920041001 + 1089100960000 = 104499^2 + 1043600^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100021001001 - 2¹³ = 1100020992809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1100021001041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 674256 + ... + 1629313.

It is an arithmetic number, because the mean of its divisors is an integer number (74940891025).

Almost surely, 2^{1100021001001} is an apocalyptic number.

It is an amenable number.

1100021001001 is a deficient number, since it is larger than the sum of its proper divisors (99033255399).

1100021001001 is a wasteful number, since it uses less digits than its factorization.

1100021001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2304028.

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

Adding to 1100021001001 its reverse (1001001200011), we get a palindrome (2101022201012).

The spelling of 1100021001001 in words is "one trillion, one hundred billion, twenty-one million, one thousand, one".