33150420421 has 4 divisors (see below), whose sum is σ = 34591743072. Its totient is φ = 31709097772.

The previous prime is 33150420403. The next prime is 33150420469. The reversal of 33150420421 is 12402405133.

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: 12402405133 = 167 ⋅74265899.

It is a cyclic number.

It is not a de Polignac number, because 33150420421 - 2³¹ = 31002936773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33150424421) 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, 720661291 + ... + 720661336.

It is an arithmetic number, because the mean of its divisors is an integer number (8647935768).

Almost surely, 2^33150420421 is an apocalyptic number.

It is an amenable number.

33150420421 is a deficient number, since it is larger than the sum of its proper divisors (1441322651).

33150420421 is a wasteful number, since it uses less digits than its factorization.

33150420421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1441322650.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 33150420421 its reverse (12402405133), we get a palindrome (45552825554).

The spelling of 33150420421 in words is "thirty-three billion, one hundred fifty million, four hundred twenty thousand, four hundred twenty-one".