40311111221 has 4 divisors (see below), whose sum is σ = 40319408844. Its totient is φ = 40302813600.

The previous prime is 40311111149. The next prime is 40311111223. The reversal of 40311111221 is 12211111304.

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 33056330596 + 7254780625 = 181814^2 + 85175^2 .

It is a cyclic number.

It is not a de Polignac number, because 40311111221 - 2³⁰ = 39237369397 is a prime.

It is a super-2 number, since 2×40311111221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40311111221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40311111223) 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, 4141520 + ... + 4151241.

It is an arithmetic number, because the mean of its divisors is an integer number (10079852211).

Almost surely, 2^40311111221 is an apocalyptic number.

It is an amenable number.

40311111221 is a deficient number, since it is larger than the sum of its proper divisors (8297623).

40311111221 is an equidigital number, since it uses as much as digits as its factorization.

40311111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8297622.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 40311111221 its reverse (12211111304), we get a palindrome (52522222525).

The spelling of 40311111221 in words is "forty billion, three hundred eleven million, one hundred eleven thousand, two hundred twenty-one".