33424143132421 has 4 divisors (see below), whose sum is σ = 35390269199052. Its totient is φ = 31458017065792.

The previous prime is 33424143132293. The next prime is 33424143132439. The reversal of 33424143132421 is 12423134142433.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16859121032196 + 16565022100225 = 4105986^2 + 4070015^2 .

It is a cyclic number.

It is not a de Polignac number, because 33424143132421 - 2⁷ = 33424143132293 is a prime.

It is a super-2 number, since 2×33424143132421² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33424143132461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 983063033290 + ... + 983063033323.

It is an arithmetic number, because the mean of its divisors is an integer number (8847567299763).

Almost surely, 2^{33424143132421} is an apocalyptic number.

It is an amenable number.

33424143132421 is a deficient number, since it is larger than the sum of its proper divisors (1966126066631).

33424143132421 is a wasteful number, since it uses less digits than its factorization.

33424143132421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1966126066630.

The product of its digits is 165888, while the sum is 37.

Adding to 33424143132421 its reverse (12423134142433), we get a palindrome (45847277274854).

The spelling of 33424143132421 in words is "thirty-three trillion, four hundred twenty-four billion, one hundred forty-three million, one hundred thirty-two thousand, four hundred twenty-one".