20111221021222 has 8 divisors (see below), whose sum is σ = 30273428110536. Its totient is φ = 10020078317712.

The previous prime is 20111221021217. The next prime is 20111221021249. The reversal of 20111221021222 is 22212012211102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20111221021222² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20111221021222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17766095743 + ... + 17766096874.

It is an arithmetic number, because the mean of its divisors is an integer number (3784178513817).

Almost surely, 2^{20111221021222} is an apocalyptic number.

20111221021222 is a deficient number, since it is larger than the sum of its proper divisors (10162207089314).

20111221021222 is a wasteful number, since it uses less digits than its factorization.

20111221021222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35532192902.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 20111221021222 its reverse (22212012211102), we get a palindrome (42323233232324).

The spelling of 20111221021222 in words is "twenty trillion, one hundred eleven billion, two hundred twenty-one million, twenty-one thousand, two hundred twenty-two".