102222212220 has 144 divisors (see below), whose sum is σ = 326358684288. Its totient is φ = 26852316480.

The previous prime is 102222212203. The next prime is 102222212251. The reversal of 102222212220 is 22212222201.

102222212220 is a `hidden beast` number, since 1 + 0 + 222 + 221 + 2 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 102222212193 and 102222212202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 168655 + ... + 482585.

It is an arithmetic number, because the mean of its divisors is an integer number (2266379752).

Almost surely, 2^102222212220 is an apocalyptic number.

102222212220 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 102222212220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163179342144).

102222212220 is an abundant number, since it is smaller than the sum of its proper divisors (224136472068).

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

102222212220 is a wasteful number, since it uses less digits than its factorization.

102222212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314022 (or 314008 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 102222212220 its reverse (22212222201), we get a palindrome (124434434421).

The spelling of 102222212220 in words is "one hundred two billion, two hundred twenty-two million, two hundred twelve thousand, two hundred twenty".