102216042542 has 4 divisors (see below), whose sum is σ = 153324063816. Its totient is φ = 51108021270.

The previous prime is 102216042497. The next prime is 102216042557. The reversal of 102216042542 is 245240612201.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25554010634 + ... + 25554010637.

It is an arithmetic number, because the mean of its divisors is an integer number (38331015954).

Almost surely, 2^102216042542 is an apocalyptic number.

102216042542 is a deficient number, since it is larger than the sum of its proper divisors (51108021274).

102216042542 is an equidigital number, since it uses as much as digits as its factorization.

102216042542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51108021273.

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 102216042542 its reverse (245240612201), we get a palindrome (347456654743).

The spelling of 102216042542 in words is "one hundred two billion, two hundred sixteen million, forty-two thousand, five hundred forty-two".