102210243442 has 4 divisors (see below), whose sum is σ = 153315365166. Its totient is φ = 51105121720.

The previous prime is 102210243409. The next prime is 102210243449. The reversal of 102210243442 is 244342012201.

102210243442 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 101787159681 + 423083761 = 319041^2 + 20569^2 .

It is not an unprimeable number, because it can be changed into a prime (102210243449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25552560859 + ... + 25552560862.

Almost surely, 2^102210243442 is an apocalyptic number.

102210243442 is a deficient number, since it is larger than the sum of its proper divisors (51105121724).

102210243442 is an equidigital number, since it uses as much as digits as its factorization.

102210243442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51105121723.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 102210243442 its reverse (244342012201), we get a palindrome (346552255643).

The spelling of 102210243442 in words is "one hundred two billion, two hundred ten million, two hundred forty-three thousand, four hundred forty-two".