1211231110323 has 32 divisors (see below), whose sum is σ = 1782330923520. Its totient is φ = 726904316160.

The previous prime is 1211231110321. The next prime is 1211231110337. The reversal of 1211231110323 is 3230111321121.

It is not a de Polignac number, because 1211231110323 - 2¹ = 1211231110321 is a prime.

It is a super-2 number, since 2×1211231110323² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1211231110323.

It is not an unprimeable number, because it can be changed into a prime (1211231110321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3910690 + ... + 4209032.

It is an arithmetic number, because the mean of its divisors is an integer number (55697841360).

Almost surely, 2^{1211231110323} is an apocalyptic number.

1211231110323 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1211231110323 is a deficient number, since it is larger than the sum of its proper divisors (571099813197).

1211231110323 is a wasteful number, since it uses less digits than its factorization.

1211231110323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300939.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1211231110323 its reverse (3230111321121), we get a palindrome (4441342431444).

The spelling of 1211231110323 in words is "one trillion, two hundred eleven billion, two hundred thirty-one million, one hundred ten thousand, three hundred twenty-three".