212221100022 has 16 divisors (see below), whose sum is σ = 435913611312. Its totient is φ = 68828464800.

The previous prime is 212221099939. The next prime is 212221100029. The reversal of 212221100022 is 220001122212.

It is a junction number, because it is equal to n+sod(n) for n = 212221099974 and 212221100010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212221100029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 477975229 + ... + 477975672.

It is an arithmetic number, because the mean of its divisors is an integer number (27244600707).

Almost surely, 2^212221100022 is an apocalyptic number.

212221100022 is an abundant number, since it is smaller than the sum of its proper divisors (223692511290).

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

212221100022 is a wasteful number, since it uses less digits than its factorization.

212221100022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955950943.

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

Adding to 212221100022 its reverse (220001122212), we get a palindrome (432222222234).

The spelling of 212221100022 in words is "two hundred twelve billion, two hundred twenty-one million, one hundred thousand, twenty-two".