1220536105605 has 24 divisors (see below), whose sum is σ = 2116340280288. Its totient is φ = 650723554656.

The previous prime is 1220536105571. The next prime is 1220536105661. The reversal of 1220536105605 is 5065016350221.

1220536105605 is a `hidden beast` number, since 1 + 2 + 2 + 0 + 5 + 36 + 10 + 5 + 605 = 666.

It is not a de Polignac number, because 1220536105605 - 2⁶ = 1220536105541 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220536105605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4642207 + ... + 4898076.

It is an arithmetic number, because the mean of its divisors is an integer number (88180845012).

Almost surely, 2^{1220536105605} is an apocalyptic number.

1220536105605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1220536105605 is a deficient number, since it is larger than the sum of its proper divisors (895804174683).

1220536105605 is a wasteful number, since it uses less digits than its factorization.

1220536105605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9543137 (or 9543134 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The spelling of 1220536105605 in words is "one trillion, two hundred twenty billion, five hundred thirty-six million, one hundred five thousand, six hundred five".