40221120209 has 4 divisors (see below), whose sum is σ = 40821435504. Its totient is φ = 39620804916.

The previous prime is 40221120187. The next prime is 40221120223. The reversal of 40221120209 is 90202112204.

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 40221120209 - 2¹⁶ = 40221054673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40221120229) 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, 300157547 + ... + 300157680.

It is an arithmetic number, because the mean of its divisors is an integer number (10205358876).

Almost surely, 2^40221120209 is an apocalyptic number.

It is an amenable number.

40221120209 is a deficient number, since it is larger than the sum of its proper divisors (600315295).

40221120209 is an equidigital number, since it uses as much as digits as its factorization.

40221120209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600315294.

The product of its (nonzero) digits is 576, while the sum is 23.

The spelling of 40221120209 in words is "forty billion, two hundred twenty-one million, one hundred twenty thousand, two hundred nine".