1231321110010 has 16 divisors (see below), whose sum is σ = 2346753174696. Its totient is φ = 463556182528.

The previous prime is 1231321110001. The next prime is 1231321110011. The reversal of 1231321110010 is 100111231321.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 784678844041 + 446642265969 = 885821^2 + 668313^2 .

It is not an unprimeable number, because it can be changed into a prime (1231321110011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3621532507 + ... + 3621532846.

Almost surely, 2^{1231321110010} is an apocalyptic number.

1231321110010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231321110010 is a deficient number, since it is larger than the sum of its proper divisors (1115432064686).

1231321110010 is a wasteful number, since it uses less digits than its factorization.

1231321110010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7243065377.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 1231321110010 its reverse (100111231321), we get a palindrome (1331432341331).

The spelling of 1231321110010 in words is "one trillion, two hundred thirty-one billion, three hundred twenty-one million, one hundred ten thousand, ten".