102220021220 has 12 divisors (see below), whose sum is σ = 214662044604. Its totient is φ = 40888008480.

The previous prime is 102220021217. The next prime is 102220021279. The reversal of 102220021220 is 22120022201.

It can be written as a sum of positive squares in 2 ways, for example, as 39836966464 + 62383054756 = 199592^2 + 249766^2 .

It is a junction number, because it is equal to n+sod(n) for n = 102220021195 and 102220021204.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2555500511 + ... + 2555500550.

It is an arithmetic number, because the mean of its divisors is an integer number (17888503717).

Almost surely, 2^102220021220 is an apocalyptic number.

102220021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102220021220 is an abundant number, since it is smaller than the sum of its proper divisors (112442023384).

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

102220021220 is a wasteful number, since it uses less digits than its factorization.

102220021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5111001070 (or 5111001068 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 102220021220 its reverse (22120022201), we get a palindrome (124340043421).

The spelling of 102220021220 in words is "one hundred two billion, two hundred twenty million, twenty-one thousand, two hundred twenty".