33013001221 has 4 divisors (see below), whose sum is σ = 33014331232. Its totient is φ = 33011671212.

The previous prime is 33013001173. The next prime is 33013001227. The reversal of 33013001221 is 12210031033.

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: 12210031033 = 149 ⋅81946517.

It is a cyclic number.

It is not a de Polignac number, because 33013001221 - 2¹⁵ = 33012968453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33013001195 and 33013001204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33013001227) 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, 627051 + ... + 677656.

It is an arithmetic number, because the mean of its divisors is an integer number (8253582808).

Almost surely, 2^33013001221 is an apocalyptic number.

It is an amenable number.

33013001221 is a deficient number, since it is larger than the sum of its proper divisors (1330011).

33013001221 is a wasteful number, since it uses less digits than its factorization.

33013001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330010.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 33013001221 its reverse (12210031033), we get a palindrome (45223032254).

The spelling of 33013001221 in words is "thirty-three billion, thirteen million, one thousand, two hundred twenty-one".