212121220111441 has 32 divisors (see below), whose sum is σ = 228231590630400. Its totient is φ = 196757152704000.

The previous prime is 212121220111439. The next prime is 212121220111447. The reversal of 212121220111441 is 144111022121212.

It is not a de Polignac number, because 212121220111441 - 2¹ = 212121220111439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212121220111447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67777720 + ... + 70838278.

It is an arithmetic number, because the mean of its divisors is an integer number (7132237207200).

Almost surely, 2^{212121220111441} is an apocalyptic number.

It is an amenable number.

212121220111441 is a deficient number, since it is larger than the sum of its proper divisors (16110370518959).

212121220111441 is a wasteful number, since it uses less digits than its factorization.

212121220111441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3061521.

The product of its (nonzero) digits is 512, while the sum is 25.

Adding to 212121220111441 its reverse (144111022121212), we get a palindrome (356232242232653).

The spelling of 212121220111441 in words is "two hundred twelve trillion, one hundred twenty-one billion, two hundred twenty million, one hundred eleven thousand, four hundred forty-one".