102100122220 has 24 divisors (see below), whose sum is σ = 214602255504. Its totient is φ = 40803477696.

The previous prime is 102100122209. The next prime is 102100122251. The reversal of 102100122220 is 22221001201.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 102100122220.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2262802 + ... + 2307481.

It is an arithmetic number, because the mean of its divisors is an integer number (8941760646).

Almost surely, 2^102100122220 is an apocalyptic number.

102100122220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102100122220 is an abundant number, since it is smaller than the sum of its proper divisors (112502133284).

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

102100122220 is a wasteful number, since it uses less digits than its factorization.

102100122220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4571409 (or 4571407 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 102100122220 its reverse (22221001201), we get a palindrome (124321123421).

The spelling of 102100122220 in words is "one hundred two billion, one hundred million, one hundred twenty-two thousand, two hundred twenty".