211212202120011 has 32 divisors (see below), whose sum is σ = 323006196787200. Its totient is φ = 136263634434720.

The previous prime is 211212202119983. The next prime is 211212202120019. The reversal of 211212202120011 is 110021202212112.

211212202120011 is a `hidden beast` number, since 211 + 2 + 1 + 220 + 21 + 200 + 11 = 666.

It is not a de Polignac number, because 211212202120011 - 2¹⁹ = 211212201595723 is a prime.

It is a super-2 number, since 2×211212202120011² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211212202120019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48142420 + ... + 52346126.

It is an arithmetic number, because the mean of its divisors is an integer number (10093943649600).

Almost surely, 2^{211212202120011} is an apocalyptic number.

211212202120011 is a deficient number, since it is larger than the sum of its proper divisors (111793994667189).

211212202120011 is a wasteful number, since it uses less digits than its factorization.

211212202120011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4263776 (or 4263770 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 211212202120011 its reverse (110021202212112), we get a palindrome (321233404332123).

The spelling of 211212202120011 in words is "two hundred eleven trillion, two hundred twelve billion, two hundred two million, one hundred twenty thousand, eleven".