1231021102312 has 16 divisors (see below), whose sum is σ = 2387756448900. Its totient is φ = 594286049280.

The previous prime is 1231021102301. The next prime is 1231021102313. The reversal of 1231021102312 is 2132011201321.

It can be written as a sum of positive squares in 2 ways, for example, as 1227322759716 + 3698342596 = 1107846^2 + 60814^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1231021102312.

It is not an unprimeable number, because it can be changed into a prime (1231021102313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2653062489 + ... + 2653062952.

Almost surely, 2^{1231021102312} is an apocalyptic number.

It is an amenable number.

1231021102312 is a deficient number, since it is larger than the sum of its proper divisors (1156735346588).

1231021102312 is a wasteful number, since it uses less digits than its factorization.

1231021102312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5306125476 (or 5306125472 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1231021102312 its reverse (2132011201321), we get a palindrome (3363032303633).

Subtracting 1231021102312 from its reverse (2132011201321), we obtain a palindrome (900990099009).

The spelling of 1231021102312 in words is "one trillion, two hundred thirty-one billion, twenty-one million, one hundred two thousand, three hundred twelve".