21045142219 has 2 divisors, whose sum is σ = 21045142220. Its totient is φ = 21045142218.

The previous prime is 21045142177. The next prime is 21045142243. The reversal of 21045142219 is 91224154012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21045142219 - 2⁹ = 21045141707 is a prime.

It is a super-2 number, since 2×21045142219² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21045142319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10522571109 + 10522571110.

It is an arithmetic number, because the mean of its divisors is an integer number (10522571110).

Almost surely, 2^21045142219 is an apocalyptic number.

21045142219 is a deficient number, since it is larger than the sum of its proper divisors (1).

21045142219 is an equidigital number, since it uses as much as digits as its factorization.

21045142219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 31.

The spelling of 21045142219 in words is "twenty-one billion, forty-five million, one hundred forty-two thousand, two hundred nineteen".