1201809087361 has 4 divisors (see below), whose sum is σ = 1201811328000. Its totient is φ = 1201806846724.

The previous prime is 1201809087341. The next prime is 1201809087373. The reversal of 1201809087361 is 1637809081021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1201809087361 - 2²⁵ = 1201775532929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201809087341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213840 + ... + 1565038.

It is an arithmetic number, because the mean of its divisors is an integer number (300452832000).

Almost surely, 2^{1201809087361} is an apocalyptic number.

It is an amenable number.

1201809087361 is a deficient number, since it is larger than the sum of its proper divisors (2240639).

1201809087361 is an equidigital number, since it uses as much as digits as its factorization.

1201809087361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2240638.

The product of its (nonzero) digits is 145152, while the sum is 46.

The spelling of 1201809087361 in words is "one trillion, two hundred one billion, eight hundred nine million, eighty-seven thousand, three hundred sixty-one".