1040563661221 has 8 divisors (see below), whose sum is σ = 1189376008640. Its totient is φ = 891791412768.

The previous prime is 1040563661219. The next prime is 1040563661239. The reversal of 1040563661221 is 1221663650401.

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 1040563661221 - 2¹ = 1040563661219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1040563661201) 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, 9969111 + ... + 10072948.

It is an arithmetic number, because the mean of its divisors is an integer number (148672001080).

Almost surely, 2^{1040563661221} is an apocalyptic number.

It is an amenable number.

1040563661221 is a deficient number, since it is larger than the sum of its proper divisors (148812347419).

1040563661221 is an equidigital number, since it uses as much as digits as its factorization.

1040563661221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20049483.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 1040563661221 in words is "one trillion, forty billion, five hundred sixty-three million, six hundred sixty-one thousand, two hundred twenty-one".