20101220222 has 16 divisors (see below), whose sum is σ = 30313522944. Its totient is φ = 9996855000.

The previous prime is 20101220203. The next prime is 20101220233. The reversal of 20101220222 is 22202210102.

It is a junction number, because it is equal to n+sod(n) for n = 20101220197 and 20101220206.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 250097 + ... + 320547.

It is an arithmetic number, because the mean of its divisors is an integer number (1894595184).

Almost surely, 2^20101220222 is an apocalyptic number.

20101220222 is a deficient number, since it is larger than the sum of its proper divisors (10212302722).

20101220222 is a wasteful number, since it uses less digits than its factorization.

20101220222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71215.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20101220222 its reverse (22202210102), we get a palindrome (42303430324).

The spelling of 20101220222 in words is "twenty billion, one hundred one million, two hundred twenty thousand, two hundred twenty-two".