102021221222 has 4 divisors (see below), whose sum is σ = 153031831836. Its totient is φ = 51010610610.

The previous prime is 102021221213. The next prime is 102021221227. The reversal of 102021221222 is 222122120201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 102021221222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021221227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25505305304 + ... + 25505305307.

It is an arithmetic number, because the mean of its divisors is an integer number (38257957959).

Almost surely, 2^102021221222 is an apocalyptic number.

102021221222 is a deficient number, since it is larger than the sum of its proper divisors (51010610614).

102021221222 is an equidigital number, since it uses as much as digits as its factorization.

102021221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51010610613.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 102021221222 its reverse (222122120201), we get a palindrome (324143341423).

The spelling of 102021221222 in words is "one hundred two billion, twenty-one million, two hundred twenty-one thousand, two hundred twenty-two".