20102220121222 has 4 divisors (see below), whose sum is σ = 30153330181836. Its totient is φ = 10051110060610.

The previous prime is 20102220121171. The next prime is 20102220121223. The reversal of 20102220121222 is 22212102220102.

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 20102220121222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102220121223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5025555030304 + ... + 5025555030307.

It is an arithmetic number, because the mean of its divisors is an integer number (7538332545459).

Almost surely, 2^{20102220121222} is an apocalyptic number.

20102220121222 is a deficient number, since it is larger than the sum of its proper divisors (10051110060614).

20102220121222 is a wasteful number, since it uses less digits than its factorization.

20102220121222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10051110060613.

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

Adding to 20102220121222 its reverse (22212102220102), we get a palindrome (42314322341324).

The spelling of 20102220121222 in words is "twenty trillion, one hundred two billion, two hundred twenty million, one hundred twenty-one thousand, two hundred twenty-two".