21111010121219 has 2 divisors, whose sum is σ = 21111010121220. Its totient is φ = 21111010121218.

The previous prime is 21111010121189. The next prime is 21111010121261. The reversal of 21111010121219 is 91212101011112.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21111010121219 is a prime.

It is a super-2 number, since 2×21111010121219² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21111010121194 and 21111010121203.

It is not a weakly prime, because it can be changed into another prime (21111010151219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555505060609 + 10555505060610.

It is an arithmetic number, because the mean of its divisors is an integer number (10555505060610).

Almost surely, 2^{21111010121219} is an apocalyptic number.

21111010121219 is a deficient number, since it is larger than the sum of its proper divisors (1).

21111010121219 is an equidigital number, since it uses as much as digits as its factorization.

21111010121219 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 21111010121219 in words is "twenty-one trillion, one hundred eleven billion, ten million, one hundred twenty-one thousand, two hundred nineteen".