21201520266419 has 2 divisors, whose sum is σ = 21201520266420. Its totient is φ = 21201520266418.

The previous prime is 21201520266401. The next prime is 21201520266527. The reversal of 21201520266419 is 91466202510212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21201520266419 is a prime.

It is a super-2 number, since 2×21201520266419² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21201520256419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600760133209 + 10600760133210.

It is an arithmetic number, because the mean of its divisors is an integer number (10600760133210).

Almost surely, 2^{21201520266419} is an apocalyptic number.

21201520266419 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201520266419 is an equidigital number, since it uses as much as digits as its factorization.

21201520266419 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 41.

The spelling of 21201520266419 in words is "twenty-one trillion, two hundred one billion, five hundred twenty million, two hundred sixty-six thousand, four hundred nineteen".