211143130021 has 4 divisors (see below), whose sum is σ = 214721827200. Its totient is φ = 207564432844.

The previous prime is 211143129983. The next prime is 211143130027. The reversal of 211143130021 is 120031341112.

211143130021 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211143130021 - 2²³ = 211134741413 is a prime.

It is a super-2 number, since 2×211143130021² (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 (211143130027) 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, 1789348501 + ... + 1789348618.

It is an arithmetic number, because the mean of its divisors is an integer number (53680456800).

Almost surely, 2^211143130021 is an apocalyptic number.

It is an amenable number.

211143130021 is a deficient number, since it is larger than the sum of its proper divisors (3578697179).

211143130021 is an equidigital number, since it uses as much as digits as its factorization.

211143130021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3578697178.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 211143130021 its reverse (120031341112), we get a palindrome (331174471133).

The spelling of 211143130021 in words is "two hundred eleven billion, one hundred forty-three million, one hundred thirty thousand, twenty-one".