33002002421 has 4 divisors (see below), whose sum is σ = 33399616992. Its totient is φ = 32604387852.

The previous prime is 33002002381. The next prime is 33002002457. The reversal of 33002002421 is 12420020033.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12420020033 = 23 ⋅540000871.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33002002421 is a prime.

It is a super-2 number, since 2×33002002421² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33002002421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33002002321) 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, 198807161 + ... + 198807326.

It is an arithmetic number, because the mean of its divisors is an integer number (8349904248).

Almost surely, 2^33002002421 is an apocalyptic number.

It is an amenable number.

33002002421 is a deficient number, since it is larger than the sum of its proper divisors (397614571).

33002002421 is an equidigital number, since it uses as much as digits as its factorization.

33002002421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397614570.

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 33002002421 its reverse (12420020033), we get a palindrome (45422022454).

The spelling of 33002002421 in words is "thirty-three billion, two million, two thousand, four hundred twenty-one".