202312120221 has 6 divisors (see below), whose sum is σ = 292228618110. Its totient is φ = 134874746808.

The previous prime is 202312120183. The next prime is 202312120273. The reversal of 202312120221 is 122021213202.

202312120221 is a `hidden beast` number, since 2 + 0 + 231 + 212 + 0 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 192072704121 + 10239416100 = 438261^2 + 101190^2 .

It is not a de Polignac number, because 202312120221 - 2¹³ = 202312112029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202312120194 and 202312120203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202312120321) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11239562226 + ... + 11239562243.

It is an arithmetic number, because the mean of its divisors is an integer number (48704769685).

Almost surely, 2^202312120221 is an apocalyptic number.

It is an amenable number.

202312120221 is a deficient number, since it is larger than the sum of its proper divisors (89916497889).

202312120221 is a wasteful number, since it uses less digits than its factorization.

202312120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22479124475 (or 22479124472 counting only the distinct ones).

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

Adding to 202312120221 its reverse (122021213202), we get a palindrome (324333333423).

The spelling of 202312120221 in words is "two hundred two billion, three hundred twelve million, one hundred twenty thousand, two hundred twenty-one".