1211301103231 has 4 divisors (see below), whose sum is σ = 1211303429464. Its totient is φ = 1211298777000.

The previous prime is 1211301103219. The next prime is 1211301103237. The reversal of 1211301103231 is 1323011031121.

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 1211301103231 - 2²¹ = 1211299006079 is a prime.

It is a super-2 number, since 2×1211301103231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211301103199 and 1211301103208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211301103237) 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 3 ways as a sum of consecutive naturals, for example, 17236 + ... + 1556566.

It is an arithmetic number, because the mean of its divisors is an integer number (302825857366).

Almost surely, 2^{1211301103231} is an apocalyptic number.

1211301103231 is a deficient number, since it is larger than the sum of its proper divisors (2326233).

1211301103231 is an equidigital number, since it uses as much as digits as its factorization.

1211301103231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2326232.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 1211301103231 its reverse (1323011031121), we get a palindrome (2534312134352).

The spelling of 1211301103231 in words is "one trillion, two hundred eleven billion, three hundred one million, one hundred three thousand, two hundred thirty-one".