21234143219 has 2 divisors, whose sum is σ = 21234143220. Its totient is φ = 21234143218.

The previous prime is 21234143201. The next prime is 21234143239. The reversal of 21234143219 is 91234143212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21234143219 is a prime.

It is a super-2 number, since 2×21234143219² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21234143239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10617071609 + 10617071610.

It is an arithmetic number, because the mean of its divisors is an integer number (10617071610).

Almost surely, 2^21234143219 is an apocalyptic number.

21234143219 is a deficient number, since it is larger than the sum of its proper divisors (1).

21234143219 is an equidigital number, since it uses as much as digits as its factorization.

21234143219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 32.

The spelling of 21234143219 in words is "twenty-one billion, two hundred thirty-four million, one hundred forty-three thousand, two hundred nineteen".