212021011 has 4 divisors (see below), whose sum is σ = 213639624. Its totient is φ = 210402400.

The previous prime is 212020987. The next prime is 212021021. The reversal of 212021011 is 110120212.

212021011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212021011 - 2⁵ = 212020979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212021021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 809110 + ... + 809371.

It is an arithmetic number, because the mean of its divisors is an integer number (53409906).

Almost surely, 2^212021011 is an apocalyptic number.

212021011 is a deficient number, since it is larger than the sum of its proper divisors (1618613).

212021011 is a wasteful number, since it uses less digits than its factorization.

212021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1618612.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 212021011 is about 14560.9412813870. The cubic root of 212021011 is about 596.2928937024.

Adding to 212021011 its reverse (110120212), we get a palindrome (322141223).

The spelling of 212021011 in words is "two hundred twelve million, twenty-one thousand, eleven".