102140140431 has 8 divisors (see below), whose sum is σ = 155642118784. Its totient is φ = 58365794520.

The previous prime is 102140140423. The next prime is 102140140489. The reversal of 102140140431 is 134041041201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102140140431 - 2³ = 102140140423 is a prime.

It is a super-2 number, since 2×102140140431² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 4863816211 = 102140140431 / (1 + 0 + 2 + 1 + 4 + 0 + 1 + 4 + 0 + 4 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102140140398 and 102140140407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102140140331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2431908085 + ... + 2431908126.

It is an arithmetic number, because the mean of its divisors is an integer number (19455264848).

Almost surely, 2^102140140431 is an apocalyptic number.

102140140431 is a deficient number, since it is larger than the sum of its proper divisors (53501978353).

102140140431 is an equidigital number, since it uses as much as digits as its factorization.

102140140431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4863816221.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 102140140431 its reverse (134041041201), we get a palindrome (236181181632).

The spelling of 102140140431 in words is "one hundred two billion, one hundred forty million, one hundred forty thousand, four hundred thirty-one".