211411042421 has 4 divisors (see below), whose sum is σ = 214307084172. Its totient is φ = 208515000672.

The previous prime is 211411042397. The next prime is 211411042459. The reversal of 211411042421 is 124240114112.

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 158320431025 + 53090611396 = 397895^2 + 230414^2 .

It is a cyclic number.

It is not a de Polignac number, because 211411042421 - 2³⁰ = 210337300597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211411042481) 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, 1448020766 + ... + 1448020911.

It is an arithmetic number, because the mean of its divisors is an integer number (53576771043).

Almost surely, 2^211411042421 is an apocalyptic number.

It is an amenable number.

211411042421 is a deficient number, since it is larger than the sum of its proper divisors (2896041751).

211411042421 is an equidigital number, since it uses as much as digits as its factorization.

211411042421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2896041750.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 211411042421 its reverse (124240114112), we get a palindrome (335651156533).

The spelling of 211411042421 in words is "two hundred eleven billion, four hundred eleven million, forty-two thousand, four hundred twenty-one".