20210121212222 has 32 divisors (see below), whose sum is σ = 30647971620000. Its totient is φ = 9994347952000.

The previous prime is 20210121212221. The next prime is 20210121212243. The reversal of 20210121212222 is 22221212101202.

It is a junction number, because it is equal to n+sod(n) for n = 20210121212194 and 20210121212203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210121212221) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1924951529 + ... + 1924962027.

It is an arithmetic number, because the mean of its divisors is an integer number (957749113125).

Almost surely, 2^{20210121212222} is an apocalyptic number.

20210121212222 is a deficient number, since it is larger than the sum of its proper divisors (10437850407778).

20210121212222 is a wasteful number, since it uses less digits than its factorization.

20210121212222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19852.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 20210121212222 its reverse (22221212101202), we get a palindrome (42431333313424).

The spelling of 20210121212222 in words is "twenty trillion, two hundred ten billion, one hundred twenty-one million, two hundred twelve thousand, two hundred twenty-two".