212021020011 has 4 divisors (see below), whose sum is σ = 282694693352. Its totient is φ = 141347346672.

The previous prime is 212021019997. The next prime is 212021020061. The reversal of 212021020011 is 110020120212.

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

It is not a de Polignac number, because 212021020011 - 2¹⁴ = 212021003627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212021020061) 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, 35336836666 + ... + 35336836671.

It is an arithmetic number, because the mean of its divisors is an integer number (70673673338).

Almost surely, 2^212021020011 is an apocalyptic number.

212021020011 is a deficient number, since it is larger than the sum of its proper divisors (70673673341).

212021020011 is an equidigital number, since it uses as much as digits as its factorization.

212021020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70673673340.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 212021020011 its reverse (110020120212), we get a palindrome (322041140223).

The spelling of 212021020011 in words is "two hundred twelve billion, twenty-one million, twenty thousand, eleven".