40455400001221 has 4 divisors (see below), whose sum is σ = 40575445698892. Its totient is φ = 40335354303552.

The previous prime is 40455400001201. The next prime is 40455400001369. The reversal of 40455400001221 is 12210000455404.

40455400001221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 19868762438721 + 20586637562500 = 4457439^2 + 4537250^2 .

It is a cyclic number.

It is not a de Polignac number, because 40455400001221 - 2³⁵ = 40421040262853 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 40455400001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40455400001201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60022848330 + ... + 60022849003.

It is an arithmetic number, because the mean of its divisors is an integer number (10143861424723).

Almost surely, 2^{40455400001221} is an apocalyptic number.

It is an amenable number.

40455400001221 is a deficient number, since it is larger than the sum of its proper divisors (120045697671).

40455400001221 is a wasteful number, since it uses less digits than its factorization.

40455400001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120045697670.

The product of its (nonzero) digits is 6400, while the sum is 28.

Adding to 40455400001221 its reverse (12210000455404), we get a palindrome (52665400456625).

The spelling of 40455400001221 in words is "forty trillion, four hundred fifty-five billion, four hundred million, one thousand, two hundred twenty-one".