212212121110121 has 32 divisors (see below), whose sum is σ = 233036664854400. Its totient is φ = 191646633024000.

The previous prime is 212212121110081. The next prime is 212212121110133. The reversal of 212212121110121 is 121011121212212.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-212212121110121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212212121110093 and 212212121110102.

It is not an unprimeable number, because it can be changed into a prime (212212121110151) 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, 4554960095 + ... + 4555006683.

It is an arithmetic number, because the mean of its divisors is an integer number (7282395776700).

Almost surely, 2^{212212121110121} is an apocalyptic number.

It is an amenable number.

212212121110121 is a deficient number, since it is larger than the sum of its proper divisors (20824543744279).

212212121110121 is a wasteful number, since it uses less digits than its factorization.

212212121110121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50441.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 212212121110121 its reverse (121011121212212), we get a palindrome (333223242322333).

The spelling of 212212121110121 in words is "two hundred twelve trillion, two hundred twelve billion, one hundred twenty-one million, one hundred ten thousand, one hundred twenty-one".