1200111120221 has 8 divisors (see below), whose sum is σ = 1292437598424. Its totient is φ = 1107786104640.

The previous prime is 1200111120193. The next prime is 1200111120259. The reversal of 1200111120221 is 1220211110021.

It can be written as a sum of positive squares in 4 ways, for example, as 211428914596 + 988682205625 = 459814^2 + 994325^2 .

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 1200111120221 - 2²⁶ = 1200044011357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200111120196 and 1200111120205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200111120281) 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, 1824335 + ... + 2393411.

It is an arithmetic number, because the mean of its divisors is an integer number (161554699803).

Almost surely, 2^{1200111120221} is an apocalyptic number.

It is an amenable number.

1200111120221 is a deficient number, since it is larger than the sum of its proper divisors (92326478203).

1200111120221 is a wasteful number, since it uses less digits than its factorization.

1200111120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731311.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1200111120221 its reverse (1220211110021), we get a palindrome (2420322230242).

The spelling of 1200111120221 in words is "one trillion, two hundred billion, one hundred eleven million, one hundred twenty thousand, two hundred twenty-one".