21110211121019 has 2 divisors, whose sum is σ = 21110211121020. Its totient is φ = 21110211121018.

The previous prime is 21110211120991. The next prime is 21110211121033. The reversal of 21110211121019 is 91012111201112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21110211121019 - 2⁴⁴ = 3518025076603 is a prime.

It is a super-2 number, since 2×21110211121019² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21110211120985 and 21110211121003.

It is not a weakly prime, because it can be changed into another prime (21110211121319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555105560509 + 10555105560510.

It is an arithmetic number, because the mean of its divisors is an integer number (10555105560510).

Almost surely, 2^{21110211121019} is an apocalyptic number.

21110211121019 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110211121019 is an equidigital number, since it uses as much as digits as its factorization.

21110211121019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 23.

The spelling of 21110211121019 in words is "twenty-one trillion, one hundred ten billion, two hundred eleven million, one hundred twenty-one thousand, nineteen".