102220212 has 12 divisors (see below), whose sum is σ = 238513856. Its totient is φ = 34073400.

The previous prime is 102220207. The next prime is 102220231. The reversal of 102220212 is 212022201.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 8518351 = 102220212 / (1 + 0 + 2 + 2 + 2 + 0 + 2 + 1 + 2).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4259164 + ... + 4259187.

Almost surely, 2^102220212 is an apocalyptic number.

102220212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

102220212 is an abundant number, since it is smaller than the sum of its proper divisors (136293644).

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

102220212 is a wasteful number, since it uses less digits than its factorization.

102220212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8518358 (or 8518356 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 102220212 is about 10110.4011789839. The cubic root of 102220212 is about 467.5688739119.

Adding to 102220212 its reverse (212022201), we get a palindrome (314242413).

It can be divided in two parts, 10 and 2220212, that added together give a palindrome (2220222).

The spelling of 102220212 in words is "one hundred two million, two hundred twenty thousand, two hundred twelve".