211420240331 has 4 divisors (see below), whose sum is σ = 211619506464. Its totient is φ = 211220974200.

The previous prime is 211420240309. The next prime is 211420240333. The reversal of 211420240331 is 133042024112.

211420240331 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 is a cyclic number.

It is not a de Polignac number, because 211420240331 - 2¹⁴ = 211420223947 is a prime.

It is a super-2 number, since 2×211420240331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211420240297 and 211420240306.

It is not an unprimeable number, because it can be changed into a prime (211420240333) 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, 99631475 + ... + 99633596.

It is an arithmetic number, because the mean of its divisors is an integer number (52904876616).

Almost surely, 2^211420240331 is an apocalyptic number.

211420240331 is a deficient number, since it is larger than the sum of its proper divisors (199266133).

211420240331 is a wasteful number, since it uses less digits than its factorization.

211420240331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199266132.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 211420240331 its reverse (133042024112), we get a palindrome (344462264443).

The spelling of 211420240331 in words is "two hundred eleven billion, four hundred twenty million, two hundred forty thousand, three hundred thirty-one".