20121132133 has 4 divisors (see below), whose sum is σ = 20122824928. Its totient is φ = 20119439340.

The previous prime is 20121132127. The next prime is 20121132137. The reversal of 20121132133 is 33123112102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20121132133 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 20121132133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121132137) 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, 828441 + ... + 852382.

It is an arithmetic number, because the mean of its divisors is an integer number (5030706232).

Almost surely, 2^20121132133 is an apocalyptic number.

It is an amenable number.

20121132133 is a deficient number, since it is larger than the sum of its proper divisors (1692795).

20121132133 is a wasteful number, since it uses less digits than its factorization.

20121132133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1692794.

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

Adding to 20121132133 its reverse (33123112102), we get a palindrome (53244244235).

The spelling of 20121132133 in words is "twenty billion, one hundred twenty-one million, one hundred thirty-two thousand, one hundred thirty-three".