140353263121 has 4 divisors (see below), whose sum is σ = 140354039332. Its totient is φ = 140352486912.

The previous prime is 140353263109. The next prime is 140353263137. The reversal of 140353263121 is 121362353041.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 121362353041 = 52901 ⋅2294141.

It can be written as a sum of positive squares in 2 ways, for example, as 66855342096 + 73497921025 = 258564^2 + 271105^2 .

It is a cyclic number.

It is not a de Polignac number, because 140353263121 - 2¹⁹ = 140352738833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140353260121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42025 + ... + 531481.

It is an arithmetic number, because the mean of its divisors is an integer number (35088509833).

Almost surely, 2^140353263121 is an apocalyptic number.

It is an amenable number.

140353263121 is a deficient number, since it is larger than the sum of its proper divisors (776211).

140353263121 is an equidigital number, since it uses as much as digits as its factorization.

140353263121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776210.

The product of its (nonzero) digits is 12960, while the sum is 31.

The spelling of 140353263121 in words is "one hundred forty billion, three hundred fifty-three million, two hundred sixty-three thousand, one hundred twenty-one".