33223420421 has 2 divisors, whose sum is σ = 33223420422. Its totient is φ = 33223420420.

The previous prime is 33223420411. The next prime is 33223420493. The reversal of 33223420421 is 12402432233.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30271128196 + 2952292225 = 173986^2 + 54335^2 .

It is a cyclic number.

It is not a de Polignac number, because 33223420421 - 2⁶ = 33223420357 is a prime.

It is a super-2 number, since 2×33223420421² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33223420411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16611710210 + 16611710211.

It is an arithmetic number, because the mean of its divisors is an integer number (16611710211).

Almost surely, 2^33223420421 is an apocalyptic number.

It is an amenable number.

33223420421 is a deficient number, since it is larger than the sum of its proper divisors (1).

33223420421 is an equidigital number, since it uses as much as digits as its factorization.

33223420421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 33223420421 its reverse (12402432233), we get a palindrome (45625852654).

The spelling of 33223420421 in words is "thirty-three billion, two hundred twenty-three million, four hundred twenty thousand, four hundred twenty-one".