212010144121 has 4 divisors (see below), whose sum is σ = 212088292852. Its totient is φ = 211931995392.

The previous prime is 212010144109. The next prime is 212010144149. The reversal of 212010144121 is 121441010212.

It is a happy number.

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 175657383225 + 36352760896 = 419115^2 + 190664^2 .

It is a cyclic number.

It is not a de Polignac number, because 212010144121 - 2⁵ = 212010144089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212010144421) 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, 39070296 + ... + 39075721.

It is an arithmetic number, because the mean of its divisors is an integer number (53022073213).

Almost surely, 2^212010144121 is an apocalyptic number.

It is an amenable number.

212010144121 is a deficient number, since it is larger than the sum of its proper divisors (78148731).

212010144121 is an equidigital number, since it uses as much as digits as its factorization.

212010144121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78148730.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 212010144121 its reverse (121441010212), we get a palindrome (333451154333).

The spelling of 212010144121 in words is "two hundred twelve billion, ten million, one hundred forty-four thousand, one hundred twenty-one".