102135544042 has 12 divisors (see below), whose sum is σ = 178216102530. Its totient is φ = 43772375976.

The previous prime is 102135543947. The next prime is 102135544057. The reversal of 102135544042 is 240445531201.

It can be written as a sum of positive squares in only one way, i.e., 84134223481 + 18001320561 = 290059^2 + 134169^2 .

It is a junction number, because it is equal to n+sod(n) for n = 102135543995 and 102135544013.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 521099617 + ... + 521099812.

Almost surely, 2^102135544042 is an apocalyptic number.

102135544042 is a deficient number, since it is larger than the sum of its proper divisors (76080558488).

102135544042 is a wasteful number, since it uses less digits than its factorization.

102135544042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042199445 (or 1042199438 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

The spelling of 102135544042 in words is "one hundred two billion, one hundred thirty-five million, five hundred forty-four thousand, forty-two".