33121375394 has 4 divisors (see below), whose sum is σ = 49682063094. Its totient is φ = 16560687696.

The previous prime is 33121375393. The next prime is 33121375403. The reversal of 33121375394 is 49357312133.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 32657188369 + 464187025 = 180713^2 + 21545^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (33121375393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8280343847 + ... + 8280343850.

Almost surely, 2^33121375394 is an apocalyptic number.

33121375394 is a deficient number, since it is larger than the sum of its proper divisors (16560687700).

33121375394 is a wasteful number, since it uses less digits than its factorization.

33121375394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16560687699.

The product of its digits is 204120, while the sum is 41.

The spelling of 33121375394 in words is "thirty-three billion, one hundred twenty-one million, three hundred seventy-five thousand, three hundred ninety-four".