1200211220321 has 4 divisors (see below), whose sum is σ = 1225747629312. Its totient is φ = 1174674811332.

The previous prime is 1200211220269. The next prime is 1200211220387. The reversal of 1200211220321 is 1230221120021.

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 1200211220321 - 2¹⁰ = 1200211219297 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1200211220321.

It is not an unprimeable number, because it can be changed into a prime (1200211210321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12768204425 + ... + 12768204518.

It is an arithmetic number, because the mean of its divisors is an integer number (306436907328).

Almost surely, 2^{1200211220321} is an apocalyptic number.

It is an amenable number.

1200211220321 is a deficient number, since it is larger than the sum of its proper divisors (25536408991).

1200211220321 is an equidigital number, since it uses as much as digits as its factorization.

1200211220321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25536408990.

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

Adding to 1200211220321 its reverse (1230221120021), we get a palindrome (2430432340342).

The spelling of 1200211220321 in words is "one trillion, two hundred billion, two hundred eleven million, two hundred twenty thousand, three hundred twenty-one".