243022120221231 has 192 divisors, whose sum is σ = 420528703795200. Its totient is φ = 138914437349376.

The previous prime is 243022120221227. The next prime is 243022120221247. The reversal of 243022120221231 is 132122021220342.

243022120221231 is a `hidden beast` number, since 2 + 4 + 3 + 0 + 221 + 202 + 2 + 1 + 231 = 666.

It is not a de Polignac number, because 243022120221231 - 2² = 243022120221227 is a prime.

It is a super-2 number, since 2×243022120221231² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 243022120221195 and 243022120221204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243022120211231) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 11272410030 + ... + 11272431588.

It is an arithmetic number, because the mean of its divisors is an integer number (2190253665600).

Almost surely, 2^{243022120221231} is an apocalyptic number.

243022120221231 is a deficient number, since it is larger than the sum of its proper divisors (177506583573969).

243022120221231 is a wasteful number, since it uses less digits than its factorization.

243022120221231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24340 (or 24328 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 243022120221231 its reverse (132122021220342), we get a palindrome (375144141441573).

The spelling of 243022120221231 in words is "two hundred forty-three trillion, twenty-two billion, one hundred twenty million, two hundred twenty-one thousand, two hundred thirty-one".