102042243205 has 32 divisors (see below), whose sum is σ = 143846228736. Its totient is φ = 68023701504.

The previous prime is 102042243169. The next prime is 102042243209. The reversal of 102042243205 is 502342240201.

It is a cyclic number.

It is not a de Polignac number, because 102042243205 - 2¹⁵ = 102042210437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102042243205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102042243209) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1543642 + ... + 1608388.

It is an arithmetic number, because the mean of its divisors is an integer number (4495194648).

Almost surely, 2^102042243205 is an apocalyptic number.

It is an amenable number.

102042243205 is a deficient number, since it is larger than the sum of its proper divisors (41803985531).

102042243205 is a wasteful number, since it uses less digits than its factorization.

102042243205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66013.

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 102042243205 its reverse (502342240201), we get a palindrome (604384483406).

The spelling of 102042243205 in words is "one hundred two billion, forty-two million, two hundred forty-three thousand, two hundred five".