33402341221 has 12 divisors (see below), whose sum is σ = 35280685344. Its totient is φ = 31619370600.

The previous prime is 33402341131. The next prime is 33402341267. The reversal of 33402341221 is 12214320433.

It is a de Polignac number, because none of the positive numbers 2^k-33402341221 is a prime.

It is a super-2 number, since 2×33402341221² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33402741221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 430216 + ... + 501886.

It is an arithmetic number, because the mean of its divisors is an integer number (2940057112).

Almost surely, 2^33402341221 is an apocalyptic number.

It is an amenable number.

33402341221 is a deficient number, since it is larger than the sum of its proper divisors (1878344123).

33402341221 is a wasteful number, since it uses less digits than its factorization.

33402341221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73000 (or 72981 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 33402341221 its reverse (12214320433), we get a palindrome (45616661654).

The spelling of 33402341221 in words is "thirty-three billion, four hundred two million, three hundred forty-one thousand, two hundred twenty-one".