11011241221 has 4 divisors (see below), whose sum is σ = 11057313600. Its totient is φ = 10965168844.

The previous prime is 11011241183. The next prime is 11011241243. The reversal of 11011241221 is 12214211011.

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 11011241221 - 2⁷ = 11011241093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11011241195 and 11011241204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011241281) 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, 23035831 + ... + 23036308.

It is an arithmetic number, because the mean of its divisors is an integer number (2764328400).

Almost surely, 2^11011241221 is an apocalyptic number.

It is an amenable number.

11011241221 is a deficient number, since it is larger than the sum of its proper divisors (46072379).

11011241221 is an equidigital number, since it uses as much as digits as its factorization.

11011241221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46072378.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11011241221 its reverse (12214211011), we get a palindrome (23225452232).

The spelling of 11011241221 in words is "eleven billion, eleven million, two hundred forty-one thousand, two hundred twenty-one".