21213601549219 has 2 divisors, whose sum is σ = 21213601549220. Its totient is φ = 21213601549218.

The previous prime is 21213601549199. The next prime is 21213601549223. The reversal of 21213601549219 is 91294510631212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21213601549219 - 2⁹ = 21213601548707 is a prime.

It is a super-2 number, since 2×21213601549219² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21213601549279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606800774609 + 10606800774610.

It is an arithmetic number, because the mean of its divisors is an integer number (10606800774610).

Almost surely, 2^{21213601549219} is an apocalyptic number.

21213601549219 is a deficient number, since it is larger than the sum of its proper divisors (1).

21213601549219 is an equidigital number, since it uses as much as digits as its factorization.

21213601549219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 46.

The spelling of 21213601549219 in words is "twenty-one trillion, two hundred thirteen billion, six hundred one million, five hundred forty-nine thousand, two hundred nineteen".