233130220121 has 20 divisors (see below), whose sum is σ = 244332904272. Its totient is φ = 222440306088.

The previous prime is 233130220091. The next prime is 233130220123. The reversal of 233130220121 is 121022031332.

It is not a de Polignac number, because 233130220121 - 2¹⁰ = 233130219097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 233130220093 and 233130220102.

It is not an unprimeable number, because it can be changed into a prime (233130220123) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 153072266 + ... + 153073788.

Almost surely, 2^233130220121 is an apocalyptic number.

It is an amenable number.

233130220121 is a deficient number, since it is larger than the sum of its proper divisors (11202684151).

233130220121 is an frugal number, since it uses more digits than its factorization.

233130220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2162 (or 2093 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 233130220121 its reverse (121022031332), we get a palindrome (354152251453).

The spelling of 233130220121 in words is "two hundred thirty-three billion, one hundred thirty million, two hundred twenty thousand, one hundred twenty-one".