211143143021 has 8 divisors (see below), whose sum is σ = 216861187224. Its totient is φ = 205425702720.

The previous prime is 211143142997. The next prime is 211143143023. The reversal of 211143143021 is 120341341112.

211143143021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 25867396 + 211117275625 = 5086^2 + 459475^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211143143021 is a prime.

It is a super-2 number, since 2×211143143021² (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 (211143143023) 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 7 ways as a sum of consecutive naturals, for example, 608831 + ... + 890483.

It is an arithmetic number, because the mean of its divisors is an integer number (27107648403).

Almost surely, 2^211143143021 is an apocalyptic number.

It is an amenable number.

211143143021 is a deficient number, since it is larger than the sum of its proper divisors (5718044203).

211143143021 is a wasteful number, since it uses less digits than its factorization.

211143143021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301951.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 211143143021 its reverse (120341341112), we get a palindrome (331484484133).

The spelling of 211143143021 in words is "two hundred eleven billion, one hundred forty-three million, one hundred forty-three thousand, twenty-one".