20121010212222 has 24 divisors (see below), whose sum is σ = 43625567339640. Its totient is φ = 6702381063600.

The previous prime is 20121010212133. The next prime is 20121010212227. The reversal of 20121010212222 is 22221201012102.

It is a happy number.

20121010212222 is a `hidden beast` number, since 20 + 1 + 210 + 1 + 0 + 212 + 222 = 666.

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 = 20121010212195 and 20121010212204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121010212227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 385168197 + ... + 385220432.

It is an arithmetic number, because the mean of its divisors is an integer number (1817731972485).

Almost surely, 2^{20121010212222} is an apocalyptic number.

20121010212222 is an abundant number, since it is smaller than the sum of its proper divisors (23504557127418).

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

20121010212222 is a wasteful number, since it uses less digits than its factorization.

20121010212222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770390088 (or 770390085 counting only the distinct ones).

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

Adding to 20121010212222 its reverse (22221201012102), we get a palindrome (42342211224324).

The spelling of 20121010212222 in words is "twenty trillion, one hundred twenty-one billion, ten million, two hundred twelve thousand, two hundred twenty-two".