102205025242 has 4 divisors (see below), whose sum is σ = 153307537866. Its totient is φ = 51102512620.

The previous prime is 102205025239. The next prime is 102205025267. The reversal of 102205025242 is 242520502201.

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., 101543558281 + 661466961 = 318659^2 + 25719^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25551256309 + ... + 25551256312.

Almost surely, 2^102205025242 is an apocalyptic number.

102205025242 is a deficient number, since it is larger than the sum of its proper divisors (51102512624).

102205025242 is an equidigital number, since it uses as much as digits as its factorization.

102205025242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51102512623.

The product of its (nonzero) digits is 3200, while the sum is 25.

Adding to 102205025242 its reverse (242520502201), we get a palindrome (344725527443).

The spelling of 102205025242 in words is "one hundred two billion, two hundred five million, twenty-five thousand, two hundred forty-two".