1216025395201 has 4 divisors (see below), whose sum is σ = 1217204858304. Its totient is φ = 1214845932100.

The previous prime is 1216025395199. The next prime is 1216025395213. The reversal of 1216025395201 is 1025935206121.

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 1216025395201 - 2¹ = 1216025395199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1216025395241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 589730005 + ... + 589732066.

It is an arithmetic number, because the mean of its divisors is an integer number (304301214576).

Almost surely, 2^{1216025395201} is an apocalyptic number.

It is an amenable number.

1216025395201 is a deficient number, since it is larger than the sum of its proper divisors (1179463103).

1216025395201 is a wasteful number, since it uses less digits than its factorization.

1216025395201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1179463102.

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 1216025395201 in words is "one trillion, two hundred sixteen billion, twenty-five million, three hundred ninety-five thousand, two hundred one".