1200112112221 has 4 divisors (see below), whose sum is σ = 1309213213344. Its totient is φ = 1091011011100.

The previous prime is 1200112112203. The next prime is 1200112112257. The reversal of 1200112112221 is 1222112110021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1200112112221 - 2²⁵ = 1200078557789 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200112112195 and 1200112112204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200112112291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54550550545 + ... + 54550550566.

It is an arithmetic number, because the mean of its divisors is an integer number (327303303336).

Almost surely, 2^{1200112112221} is an apocalyptic number.

1200112112221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200112112221 is a deficient number, since it is larger than the sum of its proper divisors (109101101123).

1200112112221 is a wasteful number, since it uses less digits than its factorization.

1200112112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109101101122.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1200112112221 its reverse (1222112110021), we get a palindrome (2422224222242).

The spelling of 1200112112221 in words is "one trillion, two hundred billion, one hundred twelve million, one hundred twelve thousand, two hundred twenty-one".