1200111120121 has 8 divisors (see below), whose sum is σ = 1202993644104. Its totient is φ = 1197231609600.

The previous prime is 1200111120041. The next prime is 1200111120127. The reversal of 1200111120121 is 1210211110021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 197459364496 + 1002651755625 = 444364^2 + 1001325^2 .

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 1200111120121 - 2⁷ = 1200111119993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200111120127) 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, 45105 + ... + 1549921.

It is an arithmetic number, because the mean of its divisors is an integer number (150374205513).

Almost surely, 2^{1200111120121} is an apocalyptic number.

It is an amenable number.

1200111120121 is a deficient number, since it is larger than the sum of its proper divisors (2882523983).

1200111120121 is a wasteful number, since it uses less digits than its factorization.

1200111120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506731.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1200111120121 its reverse (1210211110021), we get a palindrome (2410322230142).

The spelling of 1200111120121 in words is "one trillion, two hundred billion, one hundred eleven million, one hundred twenty thousand, one hundred twenty-one".