1201243638099 has 8 divisors (see below), whose sum is σ = 1616626952640. Its totient is φ = 793344707816.

The previous prime is 1201243638083. The next prime is 1201243638107. The reversal of 1201243638099 is 9908363421021.

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 1201243638099 - 2⁴ = 1201243638083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201243631099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1871095689 + ... + 1871096330.

It is an arithmetic number, because the mean of its divisors is an integer number (202078369080).

Almost surely, 2^{1201243638099} is an apocalyptic number.

1201243638099 is a deficient number, since it is larger than the sum of its proper divisors (415383314541).

1201243638099 is a wasteful number, since it uses less digits than its factorization.

1201243638099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3742192129.

The product of its (nonzero) digits is 559872, while the sum is 48.

The spelling of 1201243638099 in words is "one trillion, two hundred one billion, two hundred forty-three million, six hundred thirty-eight thousand, ninety-nine".