212211022021 has 32 divisors (see below), whose sum is σ = 236616336000. Its totient is φ = 189467486208.

The previous prime is 212211022019. The next prime is 212211022081. The reversal of 212211022021 is 120220112212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 212211022021 - 2¹ = 212211022019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212211021986 and 212211022004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212211022081) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 61813321 + ... + 61816753.

It is an arithmetic number, because the mean of its divisors is an integer number (7394260500).

Almost surely, 2^212211022021 is an apocalyptic number.

It is an amenable number.

212211022021 is a deficient number, since it is larger than the sum of its proper divisors (24405313979).

212211022021 is a wasteful number, since it uses less digits than its factorization.

212211022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6133.

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

Adding to 212211022021 its reverse (120220112212), we get a palindrome (332431134233).

The spelling of 212211022021 in words is "two hundred twelve billion, two hundred eleven million, twenty-two thousand, twenty-one".