21012120112219 has 2 divisors, whose sum is σ = 21012120112220. Its totient is φ = 21012120112218.

The previous prime is 21012120112189. The next prime is 21012120112223. The reversal of 21012120112219 is 91221102121012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21012120112219 - 2²³ = 21012111723611 is a prime.

It is a super-2 number, since 2×21012120112219² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21012120112193 and 21012120112202.

It is not a weakly prime, because it can be changed into another prime (21012120122219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506060056109 + 10506060056110.

It is an arithmetic number, because the mean of its divisors is an integer number (10506060056110).

Almost surely, 2^{21012120112219} is an apocalyptic number.

21012120112219 is a deficient number, since it is larger than the sum of its proper divisors (1).

21012120112219 is an equidigital number, since it uses as much as digits as its factorization.

21012120112219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 21012120112219 in words is "twenty-one trillion, twelve billion, one hundred twenty million, one hundred twelve thousand, two hundred nineteen".