33612121 has 8 divisors (see below), whose sum is σ = 35544320. Its totient is φ = 31696272.

The previous prime is 33612109. The next prime is 33612151. The reversal of 33612121 is 12121633.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 33612121 - 2¹³ = 33603929 is a prime.

It is a super-2 number, since 2×33612121² = 2259549356237282, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33612101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271 + ... + 8203.

It is an arithmetic number, because the mean of its divisors is an integer number (4443040).

Almost surely, 2^33612121 is an apocalyptic number.

It is an amenable number.

33612121 is a deficient number, since it is larger than the sum of its proper divisors (1932199).

33612121 is a wasteful number, since it uses less digits than its factorization.

33612121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8175.

The product of its digits is 216, while the sum is 19.

The square root of 33612121 is about 5797.5961397807. The cubic root of 33612121 is about 322.7245268586.

Adding to 33612121 its reverse (12121633), we get a palindrome (45733754).

It can be divided in two parts, 33612 and 121, that added together give a palindrome (33733).

The spelling of 33612121 in words is "thirty-three million, six hundred twelve thousand, one hundred twenty-one".