10031323221 has 6 divisors (see below), whose sum is σ = 14489689110. Its totient is φ = 6687548808.

The previous prime is 10031323207. The next prime is 10031323243. The reversal of 10031323221 is 12232313001.

10031323221 is a `hidden beast` number, since 100 + 313 + 232 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5880742596 + 4150580625 = 76686^2 + 64425^2 .

It is not a de Polignac number, because 10031323221 - 2⁵ = 10031323189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10031323194 and 10031323203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10031323021) 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, 557295726 + ... + 557295743.

It is an arithmetic number, because the mean of its divisors is an integer number (2414948185).

Almost surely, 2^10031323221 is an apocalyptic number.

It is an amenable number.

10031323221 is a deficient number, since it is larger than the sum of its proper divisors (4458365889).

10031323221 is a wasteful number, since it uses less digits than its factorization.

10031323221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114591475 (or 1114591472 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 10031323221 its reverse (12232313001), we get a palindrome (22263636222).

The spelling of 10031323221 in words is "ten billion, thirty-one million, three hundred twenty-three thousand, two hundred twenty-one".