102168187881 has 4 divisors (see below), whose sum is σ = 136224250512. Its totient is φ = 68112125252.

The previous prime is 102168187819. The next prime is 102168187883. The reversal of 102168187881 is 188781861201.

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, and also an emirpimes, since its reverse is a distinct semiprime: 188781861201 = 3 ⋅62927287067.

It is a cyclic number.

It is not a de Polignac number, because 102168187881 - 2¹⁵ = 102168155113 is a prime.

It is a super-2 number, since 2×102168187881² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (102168187883) 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, 17028031311 + ... + 17028031316.

It is an arithmetic number, because the mean of its divisors is an integer number (34056062628).

Almost surely, 2^102168187881 is an apocalyptic number.

It is an amenable number.

102168187881 is a deficient number, since it is larger than the sum of its proper divisors (34056062631).

102168187881 is an equidigital number, since it uses as much as digits as its factorization.

102168187881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34056062630.

The product of its (nonzero) digits is 344064, while the sum is 51.

The spelling of 102168187881 in words is "one hundred two billion, one hundred sixty-eight million, one hundred eighty-seven thousand, eight hundred eighty-one".