102131221034242 has 16 divisors (see below), whose sum is σ = 159858388019520. Its totient is φ = 48845114601712.

The previous prime is 102131221034209. The next prime is 102131221034299. The reversal of 102131221034242 is 242430122131201.

It is a self number, because there is not a number n which added to its sum of digits gives 102131221034242.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3444984 + ... + 14701372.

It is an arithmetic number, because the mean of its divisors is an integer number (9991149251220).

Almost surely, 2^{102131221034242} is an apocalyptic number.

102131221034242 is a deficient number, since it is larger than the sum of its proper divisors (57727166985278).

102131221034242 is a wasteful number, since it uses less digits than its factorization.

102131221034242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11453657.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 102131221034242 its reverse (242430122131201), we get a palindrome (344561343165443).

The spelling of 102131221034242 in words is "one hundred two trillion, one hundred thirty-one billion, two hundred twenty-one million, thirty-four thousand, two hundred forty-two".