33121100121 has 8 divisors (see below), whose sum is σ = 44178870240. Its totient is φ = 22072031712.

The previous prime is 33121100107. The next prime is 33121100167. The reversal of 33121100121 is 12100112133.

It is a happy number.

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

It is not a de Polignac number, because 33121100121 - 2²⁷ = 32986882393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 33121100121.

It is not an unprimeable number, because it can be changed into a prime (33121100171) 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, 2166540 + ... + 2181773.

It is an arithmetic number, because the mean of its divisors is an integer number (5522358780).

Almost surely, 2^33121100121 is an apocalyptic number.

It is an amenable number.

33121100121 is a deficient number, since it is larger than the sum of its proper divisors (11057770119).

33121100121 is a wasteful number, since it uses less digits than its factorization.

33121100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4350855.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 33121100121 its reverse (12100112133), we get a palindrome (45221212254).

The spelling of 33121100121 in words is "thirty-three billion, one hundred twenty-one million, one hundred thousand, one hundred twenty-one".