20211100222122 has 64 divisors (see below), whose sum is σ = 46730868192000. Its totient is φ = 6467122275264.

The previous prime is 20211100222109. The next prime is 20211100222133. The reversal of 20211100222122 is 22122200111202.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20211100222095 and 20211100222104.

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 31 ways as a sum of consecutive naturals, for example, 37030222 + ... + 37572057.

It is an arithmetic number, because the mean of its divisors is an integer number (730169815500).

Almost surely, 2^{20211100222122} is an apocalyptic number.

20211100222122 is an abundant number, since it is smaller than the sum of its proper divisors (26519767969878).

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

20211100222122 is a wasteful number, since it uses less digits than its factorization.

20211100222122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74602492 (or 74602486 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20211100222122 its reverse (22122200111202), we get a palindrome (42333300333324).

The spelling of 20211100222122 in words is "twenty trillion, two hundred eleven billion, one hundred million, two hundred twenty-two thousand, one hundred twenty-two".