11214155421 has 48 divisors (see below), whose sum is σ = 18809376768. Its totient is φ = 6305594400.

The previous prime is 11214155399. The next prime is 11214155423. The reversal of 11214155421 is 12455141211.

11214155421 is a `hidden beast` number, since 11 + 214 + 15 + 5 + 421 = 666.

It is not a de Polignac number, because 11214155421 - 2¹⁵ = 11214122653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11214155423) 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 47 ways as a sum of consecutive naturals, for example, 2623516 + ... + 2627786.

It is an arithmetic number, because the mean of its divisors is an integer number (391862016).

Almost surely, 2^11214155421 is an apocalyptic number.

It is an amenable number.

11214155421 is a deficient number, since it is larger than the sum of its proper divisors (7595221347).

11214155421 is a wasteful number, since it uses less digits than its factorization.

11214155421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4942 (or 4939 counting only the distinct ones).

The product of its digits is 1600, while the sum is 27.

Adding to 11214155421 its reverse (12455141211), we get a palindrome (23669296632).

The spelling of 11214155421 in words is "eleven billion, two hundred fourteen million, one hundred fifty-five thousand, four hundred twenty-one".