102134140021 has 4 divisors (see below), whose sum is σ = 103865227200. Its totient is φ = 100403052844.

The previous prime is 102134140019. The next prime is 102134140093. The reversal of 102134140021 is 120041431201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 102134140021 - 2¹ = 102134140019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102134143021) 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, 865543501 + ... + 865543618.

It is an arithmetic number, because the mean of its divisors is an integer number (25966306800).

Almost surely, 2^102134140021 is an apocalyptic number.

It is an amenable number.

102134140021 is a deficient number, since it is larger than the sum of its proper divisors (1731087179).

102134140021 is an equidigital number, since it uses as much as digits as its factorization.

102134140021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1731087178.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 102134140021 its reverse (120041431201), we get a palindrome (222175571222).

The spelling of 102134140021 in words is "one hundred two billion, one hundred thirty-four million, one hundred forty thousand, twenty-one".