20121220222102 has 4 divisors (see below), whose sum is σ = 30181830333156. Its totient is φ = 10060610111050.

The previous prime is 20121220222079. The next prime is 20121220222121. The reversal of 20121220222102 is 20122202212102.

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 20121220222102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5030305055524 + ... + 5030305055527.

It is an arithmetic number, because the mean of its divisors is an integer number (7545457583289).

Almost surely, 2^{20121220222102} is an apocalyptic number.

20121220222102 is a deficient number, since it is larger than the sum of its proper divisors (10060610111054).

20121220222102 is a wasteful number, since it uses less digits than its factorization.

20121220222102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10060610111053.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20121220222102 its reverse (20122202212102), we get a palindrome (40243422434204).

The spelling of 20121220222102 in words is "twenty trillion, one hundred twenty-one billion, two hundred twenty million, two hundred twenty-two thousand, one hundred two".