212143411121 has 4 divisors (see below), whose sum is σ = 212147237952. Its totient is φ = 212139584292.

The previous prime is 212143411097. The next prime is 212143411141. The reversal of 212143411121 is 121114341212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212143411121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212143411141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1829021 + ... + 1941546.

It is an arithmetic number, because the mean of its divisors is an integer number (53036809488).

Almost surely, 2^212143411121 is an apocalyptic number.

It is an amenable number.

212143411121 is a deficient number, since it is larger than the sum of its proper divisors (3826831).

212143411121 is an equidigital number, since it uses as much as digits as its factorization.

212143411121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3826830.

The product of its digits is 384, while the sum is 23.

Adding to 212143411121 its reverse (121114341212), we get a palindrome (333257752333).

The spelling of 212143411121 in words is "two hundred twelve billion, one hundred forty-three million, four hundred eleven thousand, one hundred twenty-one".