102220032218 has 4 divisors (see below), whose sum is σ = 153330048330. Its totient is φ = 51110016108.

The previous prime is 102220032217. The next prime is 102220032247. The reversal of 102220032218 is 812230022201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 812230022201 = 13 ⋅62479232477.

It can be written as a sum of positive squares in only one way, i.e., 102129458929 + 90573289 = 319577^2 + 9517^2 .

It is a junction number, because it is equal to n+sod(n) for n = 102220032193 and 102220032202.

It is not an unprimeable number, because it can be changed into a prime (102220032217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25555008053 + ... + 25555008056.

Almost surely, 2^102220032218 is an apocalyptic number.

102220032218 is a deficient number, since it is larger than the sum of its proper divisors (51110016112).

102220032218 is an equidigital number, since it uses as much as digits as its factorization.

102220032218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51110016111.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 102220032218 its reverse (812230022201), we get a palindrome (914450054419).

The spelling of 102220032218 in words is "one hundred two billion, two hundred twenty million, thirty-two thousand, two hundred eighteen".