21210234143 has 16 divisors (see below), whose sum is σ = 24307395840. Its totient is φ = 18129920256.

The previous prime is 21210234077. The next prime is 21210234163. The reversal of 21210234143 is 34143201212.

It is not a de Polignac number, because 21210234143 - 2²⁶ = 21143125279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210234163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6914096 + ... + 6917162.

It is an arithmetic number, because the mean of its divisors is an integer number (1519212240).

Almost surely, 2^21210234143 is an apocalyptic number.

21210234143 is a deficient number, since it is larger than the sum of its proper divisors (3097161697).

21210234143 is a wasteful number, since it uses less digits than its factorization.

21210234143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5486.

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

Adding to 21210234143 its reverse (34143201212), we get a palindrome (55353435355).

The spelling of 21210234143 in words is "twenty-one billion, two hundred ten million, two hundred thirty-four thousand, one hundred forty-three".