20211100121222 has 16 divisors (see below), whose sum is σ = 30662831005200. Its totient is φ = 9990197521920.

The previous prime is 20211100121203. The next prime is 20211100121257. The reversal of 20211100121222 is 22212100111202.

It is a super-2 number, since 2×20211100121222² (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 20211100121222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9279947 + ... + 11248982.

It is an arithmetic number, because the mean of its divisors is an integer number (1916426937825).

Almost surely, 2^{20211100121222} is an apocalyptic number.

20211100121222 is a deficient number, since it is larger than the sum of its proper divisors (10451730883978).

20211100121222 is a wasteful number, since it uses less digits than its factorization.

20211100121222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20534551.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20211100121222 its reverse (22212100111202), we get a palindrome (42423200232424).

The spelling of 20211100121222 in words is "twenty trillion, two hundred eleven billion, one hundred million, one hundred twenty-one thousand, two hundred twenty-two".