102140353243 has 4 divisors (see below), whose sum is σ = 102920050728. Its totient is φ = 101360655760.

The previous prime is 102140353223. The next prime is 102140353247. The reversal of 102140353243 is 342353041201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342353041201 = 109 ⋅3140853589.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102140353243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102140353247) 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, 389848546 + ... + 389848807.

It is an arithmetic number, because the mean of its divisors is an integer number (25730012682).

Almost surely, 2^102140353243 is an apocalyptic number.

102140353243 is a deficient number, since it is larger than the sum of its proper divisors (779697485).

102140353243 is an equidigital number, since it uses as much as digits as its factorization.

102140353243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779697484.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 102140353243 its reverse (342353041201), we get a palindrome (444493394444).

The spelling of 102140353243 in words is "one hundred two billion, one hundred forty million, three hundred fifty-three thousand, two hundred forty-three".