1100021020221 has 16 divisors (see below), whose sum is σ = 1502572014720. Its totient is φ = 715411169280.

The previous prime is 1100021020121. The next prime is 1100021020223. The reversal of 1100021020221 is 1220201200011.

It is not a de Polignac number, because 1100021020221 - 2¹⁰ = 1100021019197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1100021020197 and 1100021020206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100021020223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1512381 + ... + 2118333.

It is an arithmetic number, because the mean of its divisors is an integer number (93910750920).

Almost surely, 2^{1100021020221} is an apocalyptic number.

It is an amenable number.

1100021020221 is a deficient number, since it is larger than the sum of its proper divisors (402550994499).

1100021020221 is a wasteful number, since it uses less digits than its factorization.

1100021020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620756.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1100021020221 its reverse (1220201200011), we get a palindrome (2320222220232).

The spelling of 1100021020221 in words is "one trillion, one hundred billion, twenty-one million, twenty thousand, two hundred twenty-one".