21201101213819 has 2 divisors, whose sum is σ = 21201101213820. Its totient is φ = 21201101213818.

The previous prime is 21201101213783. The next prime is 21201101213837. The reversal of 21201101213819 is 91831210110212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21201101213819 - 2²⁰ = 21201100165243 is a prime.

It is a super-2 number, since 2×21201101213819² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21201101213899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600550606909 + 10600550606910.

It is an arithmetic number, because the mean of its divisors is an integer number (10600550606910).

Almost surely, 2^{21201101213819} is an apocalyptic number.

21201101213819 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201101213819 is an equidigital number, since it uses as much as digits as its factorization.

21201101213819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 32.

The spelling of 21201101213819 in words is "twenty-one trillion, two hundred one billion, one hundred one million, two hundred thirteen thousand, eight hundred nineteen".