1200120001055 has 8 divisors (see below), whose sum is σ = 1440503432352. Its totient is φ = 959856380128.

The previous prime is 1200120001037. The next prime is 1200120001061. The reversal of 1200120001055 is 5501000210021.

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 1200120001055 - 2¹⁴ = 1200119984671 is a prime.

It is a super-2 number, since 2×1200120001055² (a number of 25 digits) contains 22 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 7 ways as a sum of consecutive naturals, for example, 29930552 + ... + 29970621.

It is an arithmetic number, because the mean of its divisors is an integer number (180062929044).

Almost surely, 2^{1200120001055} is an apocalyptic number.

1200120001055 is a deficient number, since it is larger than the sum of its proper divisors (240383431297).

1200120001055 is an equidigital number, since it uses as much as digits as its factorization.

1200120001055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59905185.

The product of its (nonzero) digits is 100, while the sum is 17.

Adding to 1200120001055 its reverse (5501000210021), we get a palindrome (6701120211076).

The spelling of 1200120001055 in words is "one trillion, two hundred billion, one hundred twenty million, one thousand, fifty-five".