102021222220 has 72 divisors (see below), whose sum is σ = 222286572144. Its totient is φ = 39330369792.

The previous prime is 102021222187. The next prime is 102021222221. The reversal of 102021222220 is 22222120201.

It is a junction number, because it is equal to n+sod(n) for n = 102021222194 and 102021222203.

It is not an unprimeable number, because it can be changed into a prime (102021222221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9868174 + ... + 9878506.

It is an arithmetic number, because the mean of its divisors is an integer number (3087313502).

Almost surely, 2^102021222220 is an apocalyptic number.

102021222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102021222220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111143286072).

102021222220 is an abundant number, since it is smaller than the sum of its proper divisors (120265349924).

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

102021222220 is a wasteful number, since it uses less digits than its factorization.

102021222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10987 (or 10956 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 102021222220 its reverse (22222120201), we get a palindrome (124243342421).

The spelling of 102021222220 in words is "one hundred two billion, twenty-one million, two hundred twenty-two thousand, two hundred twenty".