233121111131 has 4 divisors (see below), whose sum is σ = 233251859472. Its totient is φ = 232990362792.

The previous prime is 233121111121. The next prime is 233121111161. The reversal of 233121111131 is 131111121332.

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

It is a cyclic number.

It is not a de Polignac number, because 233121111131 - 2³⁴ = 215941241947 is a prime.

It is a super-2 number, since 2×233121111131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (233121111121) 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, 65371496 + ... + 65375061.

It is an arithmetic number, because the mean of its divisors is an integer number (58312964868).

Almost surely, 2^233121111131 is an apocalyptic number.

233121111131 is a deficient number, since it is larger than the sum of its proper divisors (130748341).

233121111131 is a wasteful number, since it uses less digits than its factorization.

233121111131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130748340.

The product of its digits is 108, while the sum is 20.

Adding to 233121111131 its reverse (131111121332), we get a palindrome (364232232463).

The spelling of 233121111131 in words is "two hundred thirty-three billion, one hundred twenty-one million, one hundred eleven thousand, one hundred thirty-one".