21222134143 has 8 divisors (see below), whose sum is σ = 24769907712. Its totient is φ = 17803370616.

The previous prime is 21222134137. The next prime is 21222134149. The reversal of 21222134143 is 34143122212.

It is an interprime number because it is at equal distance from previous prime (21222134137) and next prime (21222134149).

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

It is a cyclic number.

It is not a de Polignac number, because 21222134143 - 2²¹ = 21220036991 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 (21222134149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32252155 + ... + 32252812.

It is an arithmetic number, because the mean of its divisors is an integer number (3096238464).

Almost surely, 2^21222134143 is an apocalyptic number.

21222134143 is a deficient number, since it is larger than the sum of its proper divisors (3547773569).

21222134143 is an equidigital number, since it uses as much as digits as its factorization.

21222134143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64505021.

The product of its digits is 2304, while the sum is 25.

Adding to 21222134143 its reverse (34143122212), we get a palindrome (55365256355).

The spelling of 21222134143 in words is "twenty-one billion, two hundred twenty-two million, one hundred thirty-four thousand, one hundred forty-three".