40442221221 has 16 divisors (see below), whose sum is σ = 56884175040. Its totient is φ = 25487032320.

The previous prime is 40442221207. The next prime is 40442221241. The reversal of 40442221221 is 12212224404.

It is a happy number.

It is not a de Polignac number, because 40442221221 - 2²⁵ = 40408666789 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40442221191 and 40442221200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40442221241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 743260 + ... + 795813.

It is an arithmetic number, because the mean of its divisors is an integer number (3555260940).

Almost surely, 2^40442221221 is an apocalyptic number.

It is an amenable number.

40442221221 is a deficient number, since it is larger than the sum of its proper divisors (16441953819).

40442221221 is a wasteful number, since it uses less digits than its factorization.

40442221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1539556.

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 40442221221 its reverse (12212224404), we get a palindrome (52654445625).

The spelling of 40442221221 in words is "forty billion, four hundred forty-two million, two hundred twenty-one thousand, two hundred twenty-one".