212100221022 has 16 divisors (see below), whose sum is σ = 435665319312. Its totient is φ = 68789260800.

The previous prime is 212100221009. The next prime is 212100221071. The reversal of 212100221022 is 220122001212.

It is a junction number, because it is equal to n+sod(n) for n = 212100220992 and 212100221010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 477702979 + ... + 477703422.

It is an arithmetic number, because the mean of its divisors is an integer number (27229082457).

Almost surely, 2^212100221022 is an apocalyptic number.

212100221022 is an abundant number, since it is smaller than the sum of its proper divisors (223565098290).

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

212100221022 is a wasteful number, since it uses less digits than its factorization.

212100221022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955406443.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 212100221022 its reverse (220122001212), we get a palindrome (432222222234).

The spelling of 212100221022 in words is "two hundred twelve billion, one hundred million, two hundred twenty-one thousand, twenty-two".