1211230231110 has 32 divisors (see below), whose sum is σ = 3229947283680. Its totient is φ = 322994728224.

The previous prime is 1211230231093. The next prime is 1211230231147. The reversal of 1211230231110 is 111320321121.

1211230231110 is a `hidden beast` number, since 121 + 1 + 230 + 2 + 311 + 1 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2243018677 + ... + 2243019216.

It is an arithmetic number, because the mean of its divisors is an integer number (100935852615).

Almost surely, 2^{1211230231110} is an apocalyptic number.

1211230231110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211230231110 is an abundant number, since it is smaller than the sum of its proper divisors (2018717052570).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211230231110 is a wasteful number, since it uses less digits than its factorization.

1211230231110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4486037909 (or 4486037903 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1211230231110 its reverse (111320321121), we get a palindrome (1322550552231).

The spelling of 1211230231110 in words is "one trillion, two hundred eleven billion, two hundred thirty million, two hundred thirty-one thousand, one hundred ten".