212010212021 has 16 divisors (see below), whose sum is σ = 223723684800. Its totient is φ = 200672868480.

The previous prime is 212010211979. The next prime is 212010212077. The reversal of 212010212021 is 120212010212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212010212021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212010211987 and 212010212005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212010212321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140855 + ... + 666228.

It is an arithmetic number, because the mean of its divisors is an integer number (13982730300).

Almost surely, 2^212010212021 is an apocalyptic number.

It is an amenable number.

212010212021 is a deficient number, since it is larger than the sum of its proper divisors (11713472779).

212010212021 is a wasteful number, since it uses less digits than its factorization.

212010212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807316.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 212010212021 its reverse (120212010212), we get a palindrome (332222222233).

The spelling of 212010212021 in words is "two hundred twelve billion, ten million, two hundred twelve thousand, twenty-one".