102921212 has 12 divisors (see below), whose sum is σ = 180323640. Its totient is φ = 51400176.

The previous prime is 102921199. The next prime is 102921223. The reversal of 102921212 is 212129201.

It is a happy number.

It is a congruent number.

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, 11162 + ... + 18177.

It is an arithmetic number, because the mean of its divisors is an integer number (15026970).

Almost surely, 2^102921212 is an apocalyptic number.

It is an amenable number.

102921212 is a deficient number, since it is larger than the sum of its proper divisors (77402428).

102921212 is a wasteful number, since it uses less digits than its factorization.

102921212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30220 (or 30218 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 102921212 is about 10145.0092163586. The cubic root of 102921212 is about 468.6352624183.

The spelling of 102921212 in words is "one hundred two million, nine hundred twenty-one thousand, two hundred twelve".