1211200431223 has 16 divisors (see below), whose sum is σ = 1279713542400. Its totient is φ = 1143165553920.

The previous prime is 1211200431211. The next prime is 1211200431269. The reversal of 1211200431223 is 3221340021121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211200431223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211200431194 and 1211200431203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211200431523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30042663 + ... + 30082951.

It is an arithmetic number, because the mean of its divisors is an integer number (79982096400).

Almost surely, 2^{1211200431223} is an apocalyptic number.

1211200431223 is a deficient number, since it is larger than the sum of its proper divisors (68513111177).

1211200431223 is a wasteful number, since it uses less digits than its factorization.

1211200431223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46182.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 1211200431223 its reverse (3221340021121), we get a palindrome (4432540452344).

The spelling of 1211200431223 in words is "one trillion, two hundred eleven billion, two hundred million, four hundred thirty-one thousand, two hundred twenty-three".