11233523421 has 16 divisors (see below), whose sum is σ = 16852921600. Its totient is φ = 7394216544.

The previous prime is 11233523419. The next prime is 11233523423. The reversal of 11233523421 is 12432533211.

11233523421 is a `hidden beast` number, since 1 + 1 + 233 + 5 + 2 + 3 + 421 = 666.

It is an interprime number because it is at equal distance from previous prime (11233523419) and next prime (11233523423).

It is not a de Polignac number, because 11233523421 - 2¹ = 11233523419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11233523423) 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, 2631136 + ... + 2635401.

It is an arithmetic number, because the mean of its divisors is an integer number (1053307600).

Almost surely, 2^11233523421 is an apocalyptic number.

It is an amenable number.

11233523421 is a deficient number, since it is larger than the sum of its proper divisors (5619398179).

11233523421 is an equidigital number, since it uses as much as digits as its factorization.

11233523421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5266625 (or 5266619 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The spelling of 11233523421 in words is "eleven billion, two hundred thirty-three million, five hundred twenty-three thousand, four hundred twenty-one".