140121102301021 has 4 divisors (see below), whose sum is σ = 148363520083452. Its totient is φ = 131878684518592.

The previous prime is 140121102301001. The next prime is 140121102301051. The reversal of 140121102301021 is 120103201121041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 131159527200100 + 8961575100921 = 11452490^2 + 2993589^2 .

It is a cyclic number.

It is not a de Polignac number, because 140121102301021 - 2⁴¹ = 137922079045469 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140121102301021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140121102301001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4121208891190 + ... + 4121208891223.

It is an arithmetic number, because the mean of its divisors is an integer number (37090880020863).

Almost surely, 2^{140121102301021} is an apocalyptic number.

It is an amenable number.

140121102301021 is a deficient number, since it is larger than the sum of its proper divisors (8242417782431).

140121102301021 is an equidigital number, since it uses as much as digits as its factorization.

140121102301021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8242417782430.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 140121102301021 its reverse (120103201121041), we get a palindrome (260224303422062).

The spelling of 140121102301021 in words is "one hundred forty trillion, one hundred twenty-one billion, one hundred two million, three hundred one thousand, twenty-one".