212001143 has 4 divisors (see below), whose sum is σ = 221218608. Its totient is φ = 202783680.

The previous prime is 212001109. The next prime is 212001149. The reversal of 212001143 is 341100212.

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 212001143 - 2⁶ = 212001079 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 (212001149) 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, 4608698 + ... + 4608743.

It is an arithmetic number, because the mean of its divisors is an integer number (55304652).

Almost surely, 2^212001143 is an apocalyptic number.

212001143 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

212001143 is a deficient number, since it is larger than the sum of its proper divisors (9217465).

212001143 is an equidigital number, since it uses as much as digits as its factorization.

212001143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9217464.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 212001143 is about 14560.2590292893. The cubic root of 212001143 is about 596.2742673766.

Adding to 212001143 its reverse (341100212), we get a palindrome (553101355).

The spelling of 212001143 in words is "two hundred twelve million, one thousand, one hundred forty-three".