40012104221 has 8 divisors (see below), whose sum is σ = 41039470584. Its totient is φ = 38987188480.

The previous prime is 40012104217. The next prime is 40012104359. The reversal of 40012104221 is 12240121004.

It can be written as a sum of positive squares in 4 ways, for example, as 520478596 + 39491625625 = 22814^2 + 198725^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40012104221 - 2² = 40012104217 is a prime.

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 40012104221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40012104421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 579560 + ... + 644913.

It is an arithmetic number, because the mean of its divisors is an integer number (5129933823).

Almost surely, 2^40012104221 is an apocalyptic number.

40012104221 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

40012104221 is a deficient number, since it is larger than the sum of its proper divisors (1027366363).

40012104221 is a wasteful number, since it uses less digits than its factorization.

40012104221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225311.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 40012104221 its reverse (12240121004), we get a palindrome (52252225225).

The spelling of 40012104221 in words is "forty billion, twelve million, one hundred four thousand, two hundred twenty-one".