1200211320221 has 16 divisors (see below), whose sum is σ = 1253037342960. Its totient is φ = 1148155330560.

The previous prime is 1200211320173. The next prime is 1200211320239. The reversal of 1200211320221 is 1220231120021.

It can be written as a sum of positive squares in 8 ways, for example, as 1155660025 + 1199055660196 = 33995^2 + 1095014^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200211320221 - 2²² = 1200207125917 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1200211320221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200211320241) 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 15 ways as a sum of consecutive naturals, for example, 9219101 + ... + 9348381.

It is an arithmetic number, because the mean of its divisors is an integer number (78314833935).

Almost surely, 2^{1200211320221} is an apocalyptic number.

It is an amenable number.

1200211320221 is a deficient number, since it is larger than the sum of its proper divisors (52826022739).

1200211320221 is a wasteful number, since it uses less digits than its factorization.

1200211320221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132256.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1200211320221 its reverse (1220231120021), we get a palindrome (2420442440242).

The spelling of 1200211320221 in words is "one trillion, two hundred billion, two hundred eleven million, three hundred twenty thousand, two hundred twenty-one".