102111021212 has 6 divisors (see below), whose sum is σ = 178694287128. Its totient is φ = 51055510604.

The previous prime is 102111021211. The next prime is 102111021217. The reversal of 102111021212 is 212120111201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102111021211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12763877648 + ... + 12763877655.

It is an arithmetic number, because the mean of its divisors is an integer number (29782381188).

Almost surely, 2^102111021212 is an apocalyptic number.

It is an amenable number.

102111021212 is a deficient number, since it is larger than the sum of its proper divisors (76583265916).

102111021212 is a wasteful number, since it uses less digits than its factorization.

102111021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25527755307 (or 25527755305 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 102111021212 its reverse (212120111201), we get a palindrome (314231132413).

The spelling of 102111021212 in words is "one hundred two billion, one hundred eleven million, twenty-one thousand, two hundred twelve".