20012221212222 has 16 divisors (see below), whose sum is σ = 40293062845200. Its totient is φ = 6625970333952.

The previous prime is 20012221212197. The next prime is 20012221212259. The reversal of 20012221212222 is 22221212221002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11192516563 + ... + 11192518350.

It is an arithmetic number, because the mean of its divisors is an integer number (2518316427825).

Almost surely, 2^{20012221212222} is an apocalyptic number.

20012221212222 is an abundant number, since it is smaller than the sum of its proper divisors (20280841632978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20012221212222 is a wasteful number, since it uses less digits than its factorization.

20012221212222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22385035067.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 20012221212222 its reverse (22221212221002), we get a palindrome (42233433433224).

The spelling of 20012221212222 in words is "twenty trillion, twelve billion, two hundred twenty-one million, two hundred twelve thousand, two hundred twenty-two".