40223231221 has 4 divisors (see below), whose sum is σ = 40233599244. Its totient is φ = 40212863200.

The previous prime is 40223231203. The next prime is 40223231227. The reversal of 40223231221 is 12213232204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18055296900 + 22167934321 = 134370^2 + 148889^2 .

It is a cyclic number.

It is not a de Polignac number, because 40223231221 - 2⁵ = 40223231189 is a prime.

It is a super-3 number, since 3×40223231221³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40223231192 and 40223231201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40223231227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5178190 + ... + 5185951.

It is an arithmetic number, because the mean of its divisors is an integer number (10058399811).

Almost surely, 2^40223231221 is an apocalyptic number.

It is an amenable number.

40223231221 is a deficient number, since it is larger than the sum of its proper divisors (10368023).

40223231221 is a wasteful number, since it uses less digits than its factorization.

40223231221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10368022.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 40223231221 its reverse (12213232204), we get a palindrome (52436463425).

The spelling of 40223231221 in words is "forty billion, two hundred twenty-three million, two hundred thirty-one thousand, two hundred twenty-one".