20010121012222 has 32 divisors (see below), whose sum is σ = 33069324816864. Its totient is φ = 9005102592000.

The previous prime is 20010121012171. The next prime is 20010121012229. The reversal of 20010121012222 is 22221012101002.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20010121012196 and 20010121012205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010121012229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61469278 + ... + 61793950.

It is an arithmetic number, because the mean of its divisors is an integer number (1033416400527).

Almost surely, 2^{20010121012222} is an apocalyptic number.

20010121012222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20010121012222 is a deficient number, since it is larger than the sum of its proper divisors (13059203804642).

20010121012222 is a wasteful number, since it uses less digits than its factorization.

20010121012222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352524.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20010121012222 its reverse (22221012101002), we get a palindrome (42231133113224).

The spelling of 20010121012222 in words is "twenty trillion, ten billion, one hundred twenty-one million, twelve thousand, two hundred twenty-two".