232100212221 has 24 divisors (see below), whose sum is σ = 341184635064. Its totient is φ = 152020408320.

The previous prime is 232100212213. The next prime is 232100212273. The reversal of 232100212221 is 122212001232.

232100212221 is a `hidden beast` number, since 23 + 210 + 0 + 212 + 221 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3028851225 + 229071360996 = 55035^2 + 478614^2 .

It is not a de Polignac number, because 232100212221 - 2³ = 232100212213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 232100212194 and 232100212203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (232100212121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 850710 + ... + 1089911.

It is an arithmetic number, because the mean of its divisors is an integer number (14216026461).

Almost surely, 2^232100212221 is an apocalyptic number.

It is an amenable number.

232100212221 is a deficient number, since it is larger than the sum of its proper divisors (109084422843).

232100212221 is a wasteful number, since it uses less digits than its factorization.

232100212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1940861 (or 1940858 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 232100212221 its reverse (122212001232), we get a palindrome (354312213453).

The spelling of 232100212221 in words is "two hundred thirty-two billion, one hundred million, two hundred twelve thousand, two hundred twenty-one".