140520020442101 has 4 divisors (see below), whose sum is σ = 143171341582572. Its totient is φ = 137868699301632.

The previous prime is 140520020442097. The next prime is 140520020442127. The reversal of 140520020442101 is 101244020025041.

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 77585532310225 + 62934488131876 = 8808265^2 + 7933126^2 .

It is a cyclic number.

It is not a de Polignac number, because 140520020442101 - 2² = 140520020442097 is a prime.

It is a super-2 number, since 2×140520020442101² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140520020432101) 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, 1325660570156 + ... + 1325660570261.

It is an arithmetic number, because the mean of its divisors is an integer number (35792835395643).

Almost surely, 2^{140520020442101} is an apocalyptic number.

It is an amenable number.

140520020442101 is a deficient number, since it is larger than the sum of its proper divisors (2651321140471).

140520020442101 is an equidigital number, since it uses as much as digits as its factorization.

140520020442101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2651321140470.

The product of its (nonzero) digits is 2560, while the sum is 26.

Adding to 140520020442101 its reverse (101244020025041), we get a palindrome (241764040467142).

The spelling of 140520020442101 in words is "one hundred forty trillion, five hundred twenty billion, twenty million, four hundred forty-two thousand, one hundred one".