40223144022221 has 4 divisors (see below), whose sum is σ = 40246515984444. Its totient is φ = 40199772060000.

The previous prime is 40223144022169. The next prime is 40223144022263. The reversal of 40223144022221 is 12222044132204.

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 37228119205225 + 2995024816996 = 6101485^2 + 1730614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40223144022221 is a prime.

It is a super-2 number, since 2×40223144022221² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40223144024221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11685978530 + ... + 11685981971.

It is an arithmetic number, because the mean of its divisors is an integer number (10061628996111).

Almost surely, 2^{40223144022221} is an apocalyptic number.

It is an amenable number.

40223144022221 is a deficient number, since it is larger than the sum of its proper divisors (23371962223).

40223144022221 is a wasteful number, since it uses less digits than its factorization.

40223144022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23371962222.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 40223144022221 its reverse (12222044132204), we get a palindrome (52445188154425).

The spelling of 40223144022221 in words is "forty trillion, two hundred twenty-three billion, one hundred forty-four million, twenty-two thousand, two hundred twenty-one".