1231510421141 has 16 divisors (see below), whose sum is σ = 1653496510848. Its totient is φ = 885801700800.

The previous prime is 1231510420969. The next prime is 1231510421203. The reversal of 1231510421141 is 1411240151321.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1231510421141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1231510421141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231510411141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 615139070 + ... + 615141071.

It is an arithmetic number, because the mean of its divisors is an integer number (103343531928).

Almost surely, 2^{1231510421141} is an apocalyptic number.

1231510421141 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1231510421141 is a deficient number, since it is larger than the sum of its proper divisors (421986089707).

1231510421141 is a wasteful number, since it uses less digits than its factorization.

1231510421141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1230280172.

The product of its (nonzero) digits is 960, while the sum is 26.

Adding to 1231510421141 its reverse (1411240151321), we get a palindrome (2642750572462).

The spelling of 1231510421141 in words is "one trillion, two hundred thirty-one billion, five hundred ten million, four hundred twenty-one thousand, one hundred forty-one".