33012121421 has 4 divisors (see below), whose sum is σ = 34447431072. Its totient is φ = 31576811772.

The previous prime is 33012121411. The next prime is 33012121423. The reversal of 33012121421 is 12412121033.

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: 12412121033 = 13 ⋅954778541.

It is a cyclic number.

It is not a de Polignac number, because 33012121421 - 2⁶ = 33012121357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33012121393 and 33012121402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33012121423) 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, 717654791 + ... + 717654836.

It is an arithmetic number, because the mean of its divisors is an integer number (8611857768).

Almost surely, 2^33012121421 is an apocalyptic number.

It is an amenable number.

33012121421 is a deficient number, since it is larger than the sum of its proper divisors (1435309651).

33012121421 is a wasteful number, since it uses less digits than its factorization.

33012121421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1435309650.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 33012121421 its reverse (12412121033), we get a palindrome (45424242454).

The spelling of 33012121421 in words is "thirty-three billion, twelve million, one hundred twenty-one thousand, four hundred twenty-one".