212213202021 has 16 divisors (see below), whose sum is σ = 314473494400. Its totient is φ = 141437863584.

The previous prime is 212213202001. The next prime is 212213202029. The reversal of 212213202021 is 120202312212.

212213202021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212213202021 - 2⁵ = 212213201989 is a prime.

It is a super-2 number, since 2×212213202021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212213201985 and 212213202003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212213202029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 940921 + ... + 1144446.

It is an arithmetic number, because the mean of its divisors is an integer number (19654593400).

Almost surely, 2^212213202021 is an apocalyptic number.

It is an amenable number.

212213202021 is a deficient number, since it is larger than the sum of its proper divisors (102260292379).

212213202021 is a wasteful number, since it uses less digits than its factorization.

212213202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2089145 (or 2089139 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 212213202021 its reverse (120202312212), we get a palindrome (332415514233).

The spelling of 212213202021 in words is "two hundred twelve billion, two hundred thirteen million, two hundred two thousand, twenty-one".