211141210405 has 4 divisors (see below), whose sum is σ = 253369452492. Its totient is φ = 168912968320.

The previous prime is 211141210391. The next prime is 211141210409. The reversal of 211141210405 is 504012141112.

It is a happy number.

211141210405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 25951276836 + 185189933569 = 161094^2 + 430337^2 .

It is not a de Polignac number, because 211141210405 - 2⁷ = 211141210277 is a prime.

It is a super-2 number, since 2×211141210405² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211141210409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21114121036 + ... + 21114121045.

It is an arithmetic number, because the mean of its divisors is an integer number (63342363123).

Almost surely, 2^211141210405 is an apocalyptic number.

It is an amenable number.

211141210405 is a deficient number, since it is larger than the sum of its proper divisors (42228242087).

211141210405 is an equidigital number, since it uses as much as digits as its factorization.

211141210405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42228242086.

The product of its (nonzero) digits is 320, while the sum is 22.

Adding to 211141210405 its reverse (504012141112), we get a palindrome (715153351517).

The spelling of 211141210405 in words is "two hundred eleven billion, one hundred forty-one million, two hundred ten thousand, four hundred five".