102122020242 has 80 divisors (see below), whose sum is σ = 250041508992. Its totient is φ = 30895253280.

The previous prime is 102122020199. The next prime is 102122020243. The reversal of 102122020242 is 242020221201.

102122020242 is a `hidden beast` number, since 10 + 212 + 202 + 0 + 242 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (102122020243) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1045623 + ... + 1139109.

Almost surely, 2^102122020242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102122020242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125020754496).

102122020242 is an abundant number, since it is smaller than the sum of its proper divisors (147919488750).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102122020242 is a wasteful number, since it uses less digits than its factorization.

102122020242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94125 (or 94116 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 102122020242 its reverse (242020221201), we get a palindrome (344142241443).

The spelling of 102122020242 in words is "one hundred two billion, one hundred twenty-two million, twenty thousand, two hundred forty-two".