212021122011 has 16 divisors (see below), whose sum is σ = 285690854400. Its totient is φ = 139850235648.

The previous prime is 212021122003. The next prime is 212021122031. The reversal of 212021122011 is 110221120212.

It is not a de Polignac number, because 212021122011 - 2³ = 212021122003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212021122031) 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, 933310 + ... + 1138028.

It is an arithmetic number, because the mean of its divisors is an integer number (17855678400).

Almost surely, 2^212021122011 is an apocalyptic number.

212021122011 is a deficient number, since it is larger than the sum of its proper divisors (73669732389).

212021122011 is a wasteful number, since it uses less digits than its factorization.

212021122011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208378.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 212021122011 its reverse (110221120212), we get a palindrome (322242242223).

The spelling of 212021122011 in words is "two hundred twelve billion, twenty-one million, one hundred twenty-two thousand, eleven".