212222011122121 has 32 divisors (see below), whose sum is σ = 285618262599936. Its totient is φ = 152284618080000.

The previous prime is 212222011122119. The next prime is 212222011122137. The reversal of 212222011122121 is 121221110222212.

It is not a de Polignac number, because 212222011122121 - 2¹ = 212222011122119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212222011122092 and 212222011122101.

It is not an unprimeable number, because it can be changed into a prime (212222011522121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 251371930 + ... + 252214771.

It is an arithmetic number, because the mean of its divisors is an integer number (8925570706248).

Almost surely, 2^{212222011122121} is an apocalyptic number.

It is an amenable number.

212222011122121 is a deficient number, since it is larger than the sum of its proper divisors (73396251477815).

212222011122121 is a wasteful number, since it uses less digits than its factorization.

212222011122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503587153.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 212222011122121 its reverse (121221110222212), we get a palindrome (333443121344333).

It can be divided in two parts, 21222201 and 1122121, that added together give a palindrome (22344322).

The spelling of 212222011122121 in words is "two hundred twelve trillion, two hundred twenty-two billion, eleven million, one hundred twenty-two thousand, one hundred twenty-one".