21221100111019 has 2 divisors, whose sum is σ = 21221100111020. Its totient is φ = 21221100111018.

The previous prime is 21221100110929. The next prime is 21221100111077. The reversal of 21221100111019 is 91011100112212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21221100111019 - 2²⁷ = 21220965893291 is a prime.

It is a super-2 number, since 2×21221100111019² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21221100111319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610550055509 + 10610550055510.

It is an arithmetic number, because the mean of its divisors is an integer number (10610550055510).

Almost surely, 2^{21221100111019} is an apocalyptic number.

21221100111019 is a deficient number, since it is larger than the sum of its proper divisors (1).

21221100111019 is an equidigital number, since it uses as much as digits as its factorization.

21221100111019 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 22.

The spelling of 21221100111019 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred million, one hundred eleven thousand, nineteen".