11002121111221 has 8 divisors (see below), whose sum is σ = 11059862736384. Its totient is φ = 10944380933280.

The previous prime is 11002121111183. The next prime is 11002121111231. The reversal of 11002121111221 is 12211112120011.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11002121111221 is a prime.

It is a super-2 number, since 2×11002121111221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11002121111195 and 11002121111204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11002121111231) 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 7 ways as a sum of consecutive naturals, for example, 17083366 + ... + 17715688.

It is an arithmetic number, because the mean of its divisors is an integer number (1382482842048).

Almost surely, 2^{11002121111221} is an apocalyptic number.

It is an amenable number.

11002121111221 is a deficient number, since it is larger than the sum of its proper divisors (57741625163).

11002121111221 is an equidigital number, since it uses as much as digits as its factorization.

11002121111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723611.

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

Adding to 11002121111221 its reverse (12211112120011), we get a palindrome (23213233231232).

The spelling of 11002121111221 in words is "eleven trillion, two billion, one hundred twenty-one million, one hundred eleven thousand, two hundred twenty-one".