1100000021221 has 8 divisors (see below), whose sum is σ = 1159087255200. Its totient is φ = 1041032036880.

The previous prime is 1100000021209. The next prime is 1100000021231. The reversal of 1100000021221 is 1221200000011.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1100000021221 - 2⁵ = 1100000021189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1100000021198 and 1100000021207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100000021231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29793466 + ... + 29830363.

It is an arithmetic number, because the mean of its divisors is an integer number (144885906900).

Almost surely, 2^{1100000021221} is an apocalyptic number.

It is an amenable number.

1100000021221 is a deficient number, since it is larger than the sum of its proper divisors (59087233979).

1100000021221 is an equidigital number, since it uses as much as digits as its factorization.

1100000021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59624819.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1100000021221 its reverse (1221200000011), we get a palindrome (2321200021232).

The spelling of 1100000021221 in words is "one trillion, one hundred billion, twenty-one thousand, two hundred twenty-one".