11214421221 has 16 divisors (see below), whose sum is σ = 15147417600. Its totient is φ = 7378922928.

The previous prime is 11214421217. The next prime is 11214421261. The reversal of 11214421221 is 12212441211.

It is not a de Polignac number, because 11214421221 - 2² = 11214421217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11214421201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 789040 + ... + 803126.

It is an arithmetic number, because the mean of its divisors is an integer number (946713600).

Almost surely, 2^11214421221 is an apocalyptic number.

It is an amenable number.

11214421221 is a deficient number, since it is larger than the sum of its proper divisors (3932996379).

11214421221 is a wasteful number, since it uses less digits than its factorization.

11214421221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17528.

The product of its digits is 256, while the sum is 21.

Adding to 11214421221 its reverse (12212441211), we get a palindrome (23426862432).

The spelling of 11214421221 in words is "eleven billion, two hundred fourteen million, four hundred twenty-one thousand, two hundred twenty-one".