21140420219 has 2 divisors, whose sum is σ = 21140420220. Its totient is φ = 21140420218.

The previous prime is 21140420201. The next prime is 21140420239. The reversal of 21140420219 is 91202404112.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21140420219 is a prime.

It is a super-2 number, since 2×21140420219² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21140420239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10570210109 + 10570210110.

It is an arithmetic number, because the mean of its divisors is an integer number (10570210110).

Almost surely, 2^21140420219 is an apocalyptic number.

21140420219 is a deficient number, since it is larger than the sum of its proper divisors (1).

21140420219 is an equidigital number, since it uses as much as digits as its factorization.

21140420219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

The spelling of 21140420219 in words is "twenty-one billion, one hundred forty million, four hundred twenty thousand, two hundred nineteen".