21120001219 has 2 divisors, whose sum is σ = 21120001220. Its totient is φ = 21120001218.

The previous prime is 21120001207. The next prime is 21120001261. The reversal of 21120001219 is 91210002112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21120001219 is a prime.

It is a super-2 number, since 2×21120001219² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21120001196 and 21120001205.

It is not a weakly prime, because it can be changed into another prime (21120001519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560000609 + 10560000610.

It is an arithmetic number, because the mean of its divisors is an integer number (10560000610).

Almost surely, 2^21120001219 is an apocalyptic number.

21120001219 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120001219 is an equidigital number, since it uses as much as digits as its factorization.

21120001219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 21120001219 in words is "twenty-one billion, one hundred twenty million, one thousand, two hundred nineteen".