212411403044021 has 4 divisors (see below), whose sum is σ = 219735934183500. Its totient is φ = 205086871904544.

The previous prime is 212411403044011. The next prime is 212411403044041. The reversal of 212411403044021 is 120440304114212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 146702724168100 + 65708678875921 = 12112090^2 + 8106089^2 .

It is a cyclic number.

It is not a de Polignac number, because 212411403044021 - 2¹⁰ = 212411403042997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 7324531139449 = 212411403044021 / (2 + 1 + 2 + 4 + 1 + 1 + 4 + 0 + 3 + 0 + 4 + 4 + 0 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212411403044011) 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 3 ways as a sum of consecutive naturals, for example, 3662265569696 + ... + 3662265569753.

It is an arithmetic number, because the mean of its divisors is an integer number (54933983545875).

Almost surely, 2^{212411403044021} is an apocalyptic number.

It is an amenable number.

212411403044021 is a deficient number, since it is larger than the sum of its proper divisors (7324531139479).

212411403044021 is an equidigital number, since it uses as much as digits as its factorization.

212411403044021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7324531139478.

The product of its (nonzero) digits is 6144, while the sum is 29.

Adding to 212411403044021 its reverse (120440304114212), we get a palindrome (332851707158233).

The spelling of 212411403044021 in words is "two hundred twelve trillion, four hundred eleven billion, four hundred three million, forty-four thousand, twenty-one".