231220103223321 has 6 divisors (see below), whose sum is σ = 333984593544810. Its totient is φ = 154146735482208.

The previous prime is 231220103223217. The next prime is 231220103223349. The reversal of 231220103223321 is 123322301022132.

231220103223321 is a `hidden beast` number, since 2 + 3 + 1 + 2 + 2 + 0 + 1 + 0 + 322 + 332 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 219396380841225 + 11823722382096 = 14812035^2 + 3438564^2 .

It is not a de Polignac number, because 231220103223321 - 2¹¹ = 231220103221273 is a prime.

It is a super-2 number, since 2×231220103223321² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231220103223391) 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, 12845561290176 + ... + 12845561290193.

It is an arithmetic number, because the mean of its divisors is an integer number (55664098924135).

Almost surely, 2^{231220103223321} is an apocalyptic number.

It is an amenable number.

231220103223321 is a deficient number, since it is larger than the sum of its proper divisors (102764490321489).

231220103223321 is a wasteful number, since it uses less digits than its factorization.

231220103223321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25691122580375 (or 25691122580372 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 231220103223321 its reverse (123322301022132), we get a palindrome (354542404245453).

The spelling of 231220103223321 in words is "two hundred thirty-one trillion, two hundred twenty billion, one hundred three million, two hundred twenty-three thousand, three hundred twenty-one".