1213200023311 has 4 divisors (see below), whose sum is σ = 1242790267824. Its totient is φ = 1183609778800.

The previous prime is 1213200023297. The next prime is 1213200023389. The reversal of 1213200023311 is 1133200023121.

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 1213200023311 - 2¹¹ = 1213200021263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213200023611) 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 3 ways as a sum of consecutive naturals, for example, 14795122195 + ... + 14795122276.

It is an arithmetic number, because the mean of its divisors is an integer number (310697566956).

Almost surely, 2^{1213200023311} is an apocalyptic number.

1213200023311 is a deficient number, since it is larger than the sum of its proper divisors (29590244513).

1213200023311 is an equidigital number, since it uses as much as digits as its factorization.

1213200023311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29590244512.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1213200023311 its reverse (1133200023121), we get a palindrome (2346400046432).

The spelling of 1213200023311 in words is "one trillion, two hundred thirteen billion, two hundred million, twenty-three thousand, three hundred eleven".