33233242221 has 20 divisors (see below), whose sum is σ = 49703992800. Its totient is φ = 22129042536.

The previous prime is 33233242219. The next prime is 33233242223. The reversal of 33233242221 is 12224233233.

33233242221 is a `hidden beast` number, since 3 + 3 + 233 + 2 + 422 + 2 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (33233242219) and next prime (33233242223).

It is not a de Polignac number, because 33233242221 - 2¹ = 33233242219 is a prime.

It is a super-2 number, since 2×33233242221² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33233242223) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 176551 + ... + 312468.

It is an arithmetic number, because the mean of its divisors is an integer number (2485199640).

Almost surely, 2^33233242221 is an apocalyptic number.

It is an amenable number.

33233242221 is a deficient number, since it is larger than the sum of its proper divisors (16470750579).

33233242221 is an equidigital number, since it uses as much as digits as its factorization.

33233242221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489870 (or 489861 counting only the distinct ones).

The product of its digits is 10368, while the sum is 27.

Adding to 33233242221 its reverse (12224233233), we get a palindrome (45457475454).

The spelling of 33233242221 in words is "thirty-three billion, two hundred thirty-three million, two hundred forty-two thousand, two hundred twenty-one".