1200000012311 has 4 divisors (see below), whose sum is σ = 1200065202072. Its totient is φ = 1199934822552.

The previous prime is 1200000012287. The next prime is 1200000012347. The reversal of 1200000012311 is 1132100000021.

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 1200000012311 - 2²⁶ = 1199932903447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200000012292 and 1200000012301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200000012361) 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, 32567261 + ... + 32604086.

It is an arithmetic number, because the mean of its divisors is an integer number (300016300518).

Almost surely, 2^{1200000012311} is an apocalyptic number.

1200000012311 is a deficient number, since it is larger than the sum of its proper divisors (65189761).

1200000012311 is an equidigital number, since it uses as much as digits as its factorization.

1200000012311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65189760.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 1200000012311 its reverse (1132100000021), we get a palindrome (2332100012332).

The spelling of 1200000012311 in words is "one trillion, two hundred billion, twelve thousand, three hundred eleven".