140243020043021 has 4 divisors (see below), whose sum is σ = 160277737192032. Its totient is φ = 120208302894012.

The previous prime is 140243020043017. The next prime is 140243020043023. The reversal of 140243020043021 is 120340020342041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 140243020043021 - 2² = 140243020043017 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 (140243020043023) 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, 10017358574495 + ... + 10017358574508.

It is an arithmetic number, because the mean of its divisors is an integer number (40069434298008).

Almost surely, 2^{140243020043021} is an apocalyptic number.

It is an amenable number.

140243020043021 is a deficient number, since it is larger than the sum of its proper divisors (20034717149011).

140243020043021 is an equidigital number, since it uses as much as digits as its factorization.

140243020043021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20034717149010.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 140243020043021 its reverse (120340020342041), we get a palindrome (260583040385062).

The spelling of 140243020043021 in words is "one hundred forty trillion, two hundred forty-three billion, twenty million, forty-three thousand, twenty-one".