1201144025665 has 8 divisors (see below), whose sum is σ = 1480328853480. Its totient is φ = 934944538752.

The previous prime is 1201144025629. The next prime is 1201144025701. The reversal of 1201144025665 is 5665204411021.

It is an interprime number because it is at equal distance from previous prime (1201144025629) and next prime (1201144025701).

It can be written as a sum of positive squares in 4 ways, for example, as 622254346561 + 578889679104 = 788831^2 + 760848^2 .

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 1201144025665 - 2²³ = 1201135637057 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3246335020 + ... + 3246335389.

It is an arithmetic number, because the mean of its divisors is an integer number (185041106685).

Almost surely, 2^{1201144025665} is an apocalyptic number.

It is an amenable number.

1201144025665 is a deficient number, since it is larger than the sum of its proper divisors (279184827815).

1201144025665 is an equidigital number, since it uses as much as digits as its factorization.

1201144025665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6492670451.

The product of its (nonzero) digits is 57600, while the sum is 37.

Adding to 1201144025665 its reverse (5665204411021), we get a palindrome (6866348436686).

The spelling of 1201144025665 in words is "one trillion, two hundred one billion, one hundred forty-four million, twenty-five thousand, six hundred sixty-five".