102021221212 has 6 divisors (see below), whose sum is σ = 178537137128. Its totient is φ = 51010610604.

The previous prime is 102021221171. The next prime is 102021221213. The reversal of 102021221212 is 212122120201.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021221213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12752652648 + ... + 12752652655.

Almost surely, 2^102021221212 is an apocalyptic number.

It is an amenable number.

102021221212 is a deficient number, since it is larger than the sum of its proper divisors (76515915916).

102021221212 is a wasteful number, since it uses less digits than its factorization.

102021221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25505305307 (or 25505305305 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 102021221212 its reverse (212122120201), we get a palindrome (314143341413).

The spelling of 102021221212 in words is "one hundred two billion, twenty-one million, two hundred twenty-one thousand, two hundred twelve".