1201253665885 has 64 divisors (see below), whose sum is σ = 1786741092864. Its totient is φ = 754974950400.

The previous prime is 1201253665883. The next prime is 1201253665901. The reversal of 1201253665885 is 5885663521021.

It is not a de Polignac number, because 1201253665885 - 2¹ = 1201253665883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201253665883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 54425622 + ... + 54447688.

It is an arithmetic number, because the mean of its divisors is an integer number (27917829576).

Almost surely, 2^{1201253665885} is an apocalyptic number.

It is an amenable number.

1201253665885 is a deficient number, since it is larger than the sum of its proper divisors (585487426979).

1201253665885 is a wasteful number, since it uses less digits than its factorization.

1201253665885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22934.

The product of its (nonzero) digits is 3456000, while the sum is 52.

The spelling of 1201253665885 in words is "one trillion, two hundred one billion, two hundred fifty-three million, six hundred sixty-five thousand, eight hundred eighty-five".