102020221212 has 288 divisors, whose sum is σ = 309657503232. Its totient is φ = 25564750848.

The previous prime is 102020221201. The next prime is 102020221231. The reversal of 102020221212 is 212122020201.

It is a super-2 number, since 2×102020221212² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 102020221191 and 102020221200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 22583578 + ... + 22588094.

It is an arithmetic number, because the mean of its divisors is an integer number (1075199664).

Almost surely, 2^102020221212 is an apocalyptic number.

102020221212 is a gapful number since it is divisible by the number (12) 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 102020221212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154828751616).

102020221212 is an abundant number, since it is smaller than the sum of its proper divisors (207637282020).

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

102020221212 is a wasteful number, since it uses less digits than its factorization.

102020221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4637 (or 4622 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 102020221212 its reverse (212122020201), we get a palindrome (314142241413).

The spelling of 102020221212 in words is "one hundred two billion, twenty million, two hundred twenty-one thousand, two hundred twelve".