11213552421 has 24 divisors (see below), whose sum is σ = 16325094240. Its totient is φ = 7416819936.

The previous prime is 11213552369. The next prime is 11213552429. The reversal of 11213552421 is 12425531211.

It is a happy number.

11213552421 is a `hidden beast` number, since 1 + 1 + 2 + 135 + 524 + 2 + 1 = 666.

It is not a de Polignac number, because 11213552421 - 2¹⁰ = 11213551397 is a prime.

It is a super-2 number, since 2×11213552421² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11213552429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2946706 + ... + 2950508.

It is an arithmetic number, because the mean of its divisors is an integer number (680212260).

Almost surely, 2^11213552421 is an apocalyptic number.

It is an amenable number.

11213552421 is a deficient number, since it is larger than the sum of its proper divisors (5111541819).

11213552421 is a wasteful number, since it uses less digits than its factorization.

11213552421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6305 (or 6302 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The spelling of 11213552421 in words is "eleven billion, two hundred thirteen million, five hundred fifty-two thousand, four hundred twenty-one".