20133121231 has 8 divisors (see below), whose sum is σ = 21149474400. Its totient is φ = 19128518112.

The previous prime is 20133121181. The next prime is 20133121241. The reversal of 20133121231 is 13212133102.

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 20133121231 - 2¹⁵ = 20133088463 is a prime.

It is a super-3 number, since 3×20133121231³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20133121199 and 20133121208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20133121241) 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, 2934000 + ... + 2940853.

It is an arithmetic number, because the mean of its divisors is an integer number (2643684300).

Almost surely, 2^20133121231 is an apocalyptic number.

20133121231 is a deficient number, since it is larger than the sum of its proper divisors (1016353169).

20133121231 is a wasteful number, since it uses less digits than its factorization.

20133121231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5875025.

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

Adding to 20133121231 its reverse (13212133102), we get a palindrome (33345254333).

The spelling of 20133121231 in words is "twenty billion, one hundred thirty-three million, one hundred twenty-one thousand, two hundred thirty-one".