211231421411 has 4 divisors (see below), whose sum is σ = 211435905912. Its totient is φ = 211026936912.

The previous prime is 211231421383. The next prime is 211231421413. The reversal of 211231421411 is 114124132112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211231421411 is a prime.

It is a super-2 number, since 2×211231421411² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211231421413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102240701 + ... + 102242766.

It is an arithmetic number, because the mean of its divisors is an integer number (52858976478).

Almost surely, 2^211231421411 is an apocalyptic number.

211231421411 is a deficient number, since it is larger than the sum of its proper divisors (204484501).

211231421411 is a wasteful number, since it uses less digits than its factorization.

211231421411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204484500.

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

Adding to 211231421411 its reverse (114124132112), we get a palindrome (325355553523).

The spelling of 211231421411 in words is "two hundred eleven billion, two hundred thirty-one million, four hundred twenty-one thousand, four hundred eleven".