21216224015419 has 2 divisors, whose sum is σ = 21216224015420. Its totient is φ = 21216224015418.

The previous prime is 21216224015383. The next prime is 21216224015461. The reversal of 21216224015419 is 91451042261212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21216224015419 - 2¹⁷ = 21216223884347 is a prime.

It is a super-2 number, since 2×21216224015419² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21216224015489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10608112007709 + 10608112007710.

It is an arithmetic number, because the mean of its divisors is an integer number (10608112007710).

Almost surely, 2^{21216224015419} is an apocalyptic number.

21216224015419 is a deficient number, since it is larger than the sum of its proper divisors (1).

21216224015419 is an equidigital number, since it uses as much as digits as its factorization.

21216224015419 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 40.

The spelling of 21216224015419 in words is "twenty-one trillion, two hundred sixteen billion, two hundred twenty-four million, fifteen thousand, four hundred nineteen".