102102322138 has 8 divisors (see below), whose sum is σ = 153219819060. Its totient is φ = 51029049120.

The previous prime is 102102322121. The next prime is 102102322139. The reversal of 102102322138 is 831223201201.

It can be written as a sum of positive squares in 2 ways, for example, as 81295125129 + 20807197009 = 285123^2 + 144247^2 .

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

It is not an unprimeable number, because it can be changed into a prime (102102322139) 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, 11050203 + ... + 11059438.

Almost surely, 2^102102322138 is an apocalyptic number.

102102322138 is a deficient number, since it is larger than the sum of its proper divisors (51117496922).

102102322138 is a wasteful number, since it uses less digits than its factorization.

102102322138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22111952.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 102102322138 its reverse (831223201201), we get a palindrome (933325523339).

The spelling of 102102322138 in words is "one hundred two billion, one hundred two million, three hundred twenty-two thousand, one hundred thirty-eight".