1100021221001 has 4 divisors (see below), whose sum is σ = 1100031368832. Its totient is φ = 1100011073172.

The previous prime is 1100021220997. The next prime is 1100021221043. The reversal of 1100021221001 is 1001221200011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1100021221001 - 2² = 1100021220997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1100021221081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4909541 + ... + 5128706.

It is an arithmetic number, because the mean of its divisors is an integer number (275007842208).

Almost surely, 2^{1100021221001} is an apocalyptic number.

It is an amenable number.

1100021221001 is a deficient number, since it is larger than the sum of its proper divisors (10147831).

1100021221001 is a wasteful number, since it uses less digits than its factorization.

1100021221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10147830.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1100021221001 its reverse (1001221200011), we get a palindrome (2101242421012).

The spelling of 1100021221001 in words is "one trillion, one hundred billion, twenty-one million, two hundred twenty-one thousand, one".