140240240423021 has 16 divisors (see below), whose sum is σ = 142235570085744. Its totient is φ = 138246926598144.

The previous prime is 140240240422981. The next prime is 140240240423039. The reversal of 140240240423021 is 120324042042041.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 7812505747396 + 132427734675625 = 2795086^2 + 11507725^2 .

It is a cyclic number.

It is not a de Polignac number, because 140240240423021 - 2³⁰ = 140239166681197 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140240240023021) 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, 3068892845 + ... + 3068938541.

It is an arithmetic number, because the mean of its divisors is an integer number (8889723130359).

Almost surely, 2^{140240240423021} is an apocalyptic number.

It is an amenable number.

140240240423021 is a deficient number, since it is larger than the sum of its proper divisors (1995329662723).

140240240423021 is a wasteful number, since it uses less digits than its factorization.

140240240423021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66800.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 140240240423021 its reverse (120324042042041), we get a palindrome (260564282465062).

The spelling of 140240240423021 in words is "one hundred forty trillion, two hundred forty billion, two hundred forty million, four hundred twenty-three thousand, twenty-one".