40120040221 has 8 divisors (see below), whose sum is σ = 40523152824. Its totient is φ = 39717043200.

The previous prime is 40120040201. The next prime is 40120040263. The reversal of 40120040221 is 12204002104.

It can be written as a sum of positive squares in 4 ways, for example, as 341732196 + 39778308025 = 18486^2 + 199445^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40120040221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40120040195 and 40120040204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40120040201) 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, 782445 + ... + 832141.

It is an arithmetic number, because the mean of its divisors is an integer number (5065394103).

Almost surely, 2^40120040221 is an apocalyptic number.

It is an amenable number.

40120040221 is a deficient number, since it is larger than the sum of its proper divisors (403112603).

40120040221 is a wasteful number, since it uses less digits than its factorization.

40120040221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57791.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 40120040221 its reverse (12204002104), we get a palindrome (52324042325).

The spelling of 40120040221 in words is "forty billion, one hundred twenty million, forty thousand, two hundred twenty-one".