1200001220311 has 4 divisors (see below), whose sum is σ = 1200086637624. Its totient is φ = 1199915803000.

The previous prime is 1200001220291. The next prime is 1200001220339. The reversal of 1200001220311 is 1130221000021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1200001220311 - 2¹¹ = 1200001218263 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200001220291 and 1200001220300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200001220381) 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, 42687580 + ... + 42715681.

It is an arithmetic number, because the mean of its divisors is an integer number (300021659406).

Almost surely, 2^{1200001220311} is an apocalyptic number.

1200001220311 is a deficient number, since it is larger than the sum of its proper divisors (85417313).

1200001220311 is an equidigital number, since it uses as much as digits as its factorization.

1200001220311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85417312.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 1200001220311 its reverse (1130221000021), we get a palindrome (2330222220332).

The spelling of 1200001220311 in words is "one trillion, two hundred billion, one million, two hundred twenty thousand, three hundred eleven".