33121131101 has 4 divisors (see below), whose sum is σ = 34263239100. Its totient is φ = 31979023104.

The previous prime is 33121131083. The next prime is 33121131157. The reversal of 33121131101 is 10113112133.

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

It can be written as a sum of positive squares in 2 ways, for example, as 24414375001 + 8706756100 = 156251^2 + 93310^2 .

It is a cyclic number.

It is not a de Polignac number, because 33121131101 - 2¹⁴ = 33121114717 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 33121131101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33121136101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 571053956 + ... + 571054013.

It is an arithmetic number, because the mean of its divisors is an integer number (8565809775).

Almost surely, 2^33121131101 is an apocalyptic number.

It is an amenable number.

33121131101 is a deficient number, since it is larger than the sum of its proper divisors (1142107999).

33121131101 is a wasteful number, since it uses less digits than its factorization.

33121131101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142107998.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 33121131101 its reverse (10113112133), we get a palindrome (43234243234).

The spelling of 33121131101 in words is "thirty-three billion, one hundred twenty-one million, one hundred thirty-one thousand, one hundred one".