102135147381 has 6 divisors (see below), whose sum is σ = 147528546230. Its totient is φ = 68090098248.

The previous prime is 102135147343. The next prime is 102135147391. The reversal of 102135147381 is 183741531201.

102135147381 is a `hidden beast` number, since 1 + 0 + 2 + 135 + 147 + 381 = 666.

It can be written as a sum of positive squares in only one way, i.e., 91972692900 + 10162454481 = 303270^2 + 100809^2 .

It is not a de Polignac number, because 102135147381 - 2¹⁹ = 102134623093 is a prime.

It is a super-2 number, since 2×102135147381² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102135147391) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5674174846 + ... + 5674174863.

Almost surely, 2^102135147381 is an apocalyptic number.

It is an amenable number.

102135147381 is a deficient number, since it is larger than the sum of its proper divisors (45393398849).

102135147381 is a wasteful number, since it uses less digits than its factorization.

102135147381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11348349715 (or 11348349712 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

Adding to 102135147381 its reverse (183741531201), we get a palindrome (285876678582).

The spelling of 102135147381 in words is "one hundred two billion, one hundred thirty-five million, one hundred forty-seven thousand, three hundred eighty-one".