12533552235421 has 16 divisors (see below), whose sum is σ = 14336061515776. Its totient is φ = 10734046375536.

The previous prime is 12533552235403. The next prime is 12533552235439. The reversal of 12533552235421 is 12453225533521.

It is an interprime number because it is at equal distance from previous prime (12533552235403) and next prime (12533552235439).

It is a cyclic number.

It is not a de Polignac number, because 12533552235421 - 2⁵ = 12533552235389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12533552238421) 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, 51893080 + ... + 52134046.

It is an arithmetic number, because the mean of its divisors is an integer number (896003844736).

Almost surely, 2^{12533552235421} is an apocalyptic number.

It is an amenable number.

12533552235421 is a deficient number, since it is larger than the sum of its proper divisors (1802509280355).

12533552235421 is a wasteful number, since it uses less digits than its factorization.

12533552235421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247168.

The product of its digits is 1080000, while the sum is 43.

Adding to 12533552235421 its reverse (12453225533521), we get a palindrome (24986777768942).

The spelling of 12533552235421 in words is "twelve trillion, five hundred thirty-three billion, five hundred fifty-two million, two hundred thirty-five thousand, four hundred twenty-one".