223313131021 has 8 divisors (see below), whose sum is σ = 224564406264. Its totient is φ = 222063045120.

The previous prime is 223313131009. The next prime is 223313131037. The reversal of 223313131021 is 120131313322.

It can be written as a sum of positive squares in 4 ways, for example, as 181978174921 + 41334956100 = 426589^2 + 203310^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223313131021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 223313130983 and 223313131001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223313131721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80581 + ... + 673141.

It is an arithmetic number, because the mean of its divisors is an integer number (28070550783).

Almost surely, 2^223313131021 is an apocalyptic number.

It is an amenable number.

223313131021 is a deficient number, since it is larger than the sum of its proper divisors (1251275243).

223313131021 is a wasteful number, since it uses less digits than its factorization.

223313131021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594671.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 223313131021 its reverse (120131313322), we get a palindrome (343444444343).

The spelling of 223313131021 in words is "two hundred twenty-three billion, three hundred thirteen million, one hundred thirty-one thousand, twenty-one".