102124221402 has 16 divisors (see below), whose sum is σ = 233426791872. Its totient is φ = 29178348960.

The previous prime is 102124221389. The next prime is 102124221403. The reversal of 102124221402 is 204122421201.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (102124221403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1215764499 + ... + 1215764582.

It is an arithmetic number, because the mean of its divisors is an integer number (14589174492).

Almost surely, 2^102124221402 is an apocalyptic number.

102124221402 is an abundant number, since it is smaller than the sum of its proper divisors (131302570470).

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

102124221402 is a wasteful number, since it uses less digits than its factorization.

102124221402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2431529093.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 102124221402 its reverse (204122421201), we get a palindrome (306246642603).

The spelling of 102124221402 in words is "one hundred two billion, one hundred twenty-four million, two hundred twenty-one thousand, four hundred two".