40042202221 has 4 divisors (see below), whose sum is σ = 45762516832. Its totient is φ = 34321887612.

The previous prime is 40042202191. The next prime is 40042202231. The reversal of 40042202221 is 12220224004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40042202221 - 2¹⁷ = 40042071149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40042202231) 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 3 ways as a sum of consecutive naturals, for example, 2860157295 + ... + 2860157308.

It is an arithmetic number, because the mean of its divisors is an integer number (11440629208).

Almost surely, 2^40042202221 is an apocalyptic number.

It is an amenable number.

40042202221 is a deficient number, since it is larger than the sum of its proper divisors (5720314611).

40042202221 is an equidigital number, since it uses as much as digits as its factorization.

40042202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5720314610.

The product of its (nonzero) digits is 512, while the sum is 19.

Adding to 40042202221 its reverse (12220224004), we get a palindrome (52262426225).

The spelling of 40042202221 in words is "forty billion, forty-two million, two hundred two thousand, two hundred twenty-one".