211212111122011 has 16 divisors (see below), whose sum is σ = 220003435887840. Its totient is φ = 202607481726720.

The previous prime is 211212111122009. The next prime is 211212111122039. The reversal of 211212111122011 is 110221111212112.

It is a cyclic number.

It is not a de Polignac number, because 211212111122011 - 2¹ = 211212111122009 is a prime.

It is a super-2 number, since 2×211212111122011² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211212111122011.

It is not an unprimeable number, because it can be changed into a prime (211212111122711) 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, 59943466 + ... + 63369103.

It is an arithmetic number, because the mean of its divisors is an integer number (13750214742990).

Almost surely, 2^{211212111122011} is an apocalyptic number.

211212111122011 is a deficient number, since it is larger than the sum of its proper divisors (8791324765829).

211212111122011 is a wasteful number, since it uses less digits than its factorization.

211212111122011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123313326.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 211212111122011 its reverse (110221111212112), we get a palindrome (321433222334123).

The spelling of 211212111122011 in words is "two hundred eleven trillion, two hundred twelve billion, one hundred eleven million, one hundred twenty-two thousand, eleven".