243141131021 has 24 divisors (see below), whose sum is σ = 255764070720. Its totient is φ = 231066877440.

The previous prime is 243141130993. The next prime is 243141131053. The reversal of 243141131021 is 120131141342.

It is a de Polignac number, because none of the positive numbers 2^k-243141131021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243141133021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77505965 + ... + 77509101.

It is an arithmetic number, because the mean of its divisors is an integer number (10656836280).

Almost surely, 2^243141131021 is an apocalyptic number.

It is an amenable number.

243141131021 is a deficient number, since it is larger than the sum of its proper divisors (12622939699).

243141131021 is a wasteful number, since it uses less digits than its factorization.

243141131021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4625 (or 4594 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 243141131021 its reverse (120131141342), we get a palindrome (363272272363).

The spelling of 243141131021 in words is "two hundred forty-three billion, one hundred forty-one million, one hundred thirty-one thousand, twenty-one".