1201203555555 has 8 divisors (see below), whose sum is σ = 1921925688912. Its totient is φ = 640641896288.

The previous prime is 1201203555529. The next prime is 1201203555589. The reversal of 1201203555555 is 5555553021021.

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 1201203555555 - 2⁷ = 1201203555427 is a prime.

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, 40040118504 + ... + 40040118533.

It is an arithmetic number, because the mean of its divisors is an integer number (240240711114).

Almost surely, 2^{1201203555555} is an apocalyptic number.

1201203555555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1201203555555 is a deficient number, since it is larger than the sum of its proper divisors (720722133357).

1201203555555 is an equidigital number, since it uses as much as digits as its factorization.

1201203555555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80080237045.

The product of its (nonzero) digits is 187500, while the sum is 39.

Adding to 1201203555555 its reverse (5555553021021), we get a palindrome (6756756576576).

The spelling of 1201203555555 in words is "one trillion, two hundred one billion, two hundred three million, five hundred fifty-five thousand, five hundred fifty-five".