1200055000055 has 4 divisors (see below), whose sum is σ = 1440066000072. Its totient is φ = 960044000040.

The previous prime is 1200055000043. The next prime is 1200055000061. The reversal of 1200055000055 is 5500005500021.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1200055000055 - 2⁸ = 1200054999799 is a prime.

It is a super-3 number, since 3×1200055000055³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120005500001 + ... + 120005500010.

It is an arithmetic number, because the mean of its divisors is an integer number (360016500018).

Almost surely, 2^{1200055000055} is an apocalyptic number.

1200055000055 is a deficient number, since it is larger than the sum of its proper divisors (240011000017).

1200055000055 is an equidigital number, since it uses as much as digits as its factorization.

1200055000055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240011000016.

The product of its (nonzero) digits is 1250, while the sum is 23.

The spelling of 1200055000055 in words is "one trillion, two hundred billion, fifty-five million, fifty-five", and thus it is an aban number.