21272221219 has 2 divisors, whose sum is σ = 21272221220. Its totient is φ = 21272221218.

The previous prime is 21272221199. The next prime is 21272221231. The reversal of 21272221219 is 91212227212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21272221219 is a prime.

It is a super-2 number, since 2×21272221219² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21272222219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10636110609 + 10636110610.

It is an arithmetic number, because the mean of its divisors is an integer number (10636110610).

Almost surely, 2^21272221219 is an apocalyptic number.

21272221219 is a deficient number, since it is larger than the sum of its proper divisors (1).

21272221219 is an equidigital number, since it uses as much as digits as its factorization.

21272221219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 31.

The spelling of 21272221219 in words is "twenty-one billion, two hundred seventy-two million, two hundred twenty-one thousand, two hundred nineteen".