212121110022 has 16 divisors (see below), whose sum is σ = 424927594560. Its totient is φ = 70592807592.

The previous prime is 212121109997. The next prime is 212121110083. The reversal of 212121110022 is 220011121212.

It is a junction number, because it is equal to n+sod(n) for n = 212121109983 and 212121110010.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 28553248 + ... + 28560675.

It is an arithmetic number, because the mean of its divisors is an integer number (26557974660).

Almost surely, 2^212121110022 is an apocalyptic number.

212121110022 is an abundant number, since it is smaller than the sum of its proper divisors (212806484538).

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

212121110022 is a wasteful number, since it uses less digits than its factorization.

212121110022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57114547.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 212121110022 its reverse (220011121212), we get a palindrome (432132231234).

The spelling of 212121110022 in words is "two hundred twelve billion, one hundred twenty-one million, one hundred ten thousand, twenty-two".