102002101220 has 12 divisors (see below), whose sum is σ = 214204412604. Its totient is φ = 40800840480.

The previous prime is 102002101213. The next prime is 102002101237. The reversal of 102002101220 is 22101200201.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 80289489316 + 21712611904 = 283354^2 + 147352^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2550052511 + ... + 2550052550.

It is an arithmetic number, because the mean of its divisors is an integer number (17850367717).

Almost surely, 2^102002101220 is an apocalyptic number.

102002101220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102002101220 is an abundant number, since it is smaller than the sum of its proper divisors (112202311384).

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

102002101220 is a wasteful number, since it uses less digits than its factorization.

102002101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5100105070 (or 5100105068 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 102002101220 its reverse (22101200201), we get a palindrome (124103301421).

The spelling of 102002101220 in words is "one hundred two billion, two million, one hundred one thousand, two hundred twenty".