102220121220 has 96 divisors (see below), whose sum is σ = 344320435200. Its totient is φ = 22134881664.

The previous prime is 102220121197. The next prime is 102220121221. The reversal of 102220121220 is 22121022201.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 102220121220.

It is not an unprimeable number, because it can be changed into a prime (102220121221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6396790 + ... + 6412749.

It is an arithmetic number, because the mean of its divisors is an integer number (3586671200).

Almost surely, 2^102220121220 is an apocalyptic number.

102220121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102220121220 is an abundant number, since it is smaller than the sum of its proper divisors (242100313980).

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

102220121220 is a wasteful number, since it uses less digits than its factorization.

102220121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12809577 (or 12809575 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 102220121220 its reverse (22121022201), we get a palindrome (124341143421).

The spelling of 102220121220 in words is "one hundred two billion, two hundred twenty million, one hundred twenty-one thousand, two hundred twenty".