221111194019 has 2 divisors, whose sum is σ = 221111194020. Its totient is φ = 221111194018.

The previous prime is 221111194009. The next prime is 221111194033. The reversal of 221111194019 is 910491111122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221111194019 - 2⁸ = 221111193763 is a prime.

It is a super-2 number, since 2×221111194019² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (221111194009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110555597009 + 110555597010.

It is an arithmetic number, because the mean of its divisors is an integer number (110555597010).

Almost surely, 2^221111194019 is an apocalyptic number.

221111194019 is a deficient number, since it is larger than the sum of its proper divisors (1).

221111194019 is an equidigital number, since it uses as much as digits as its factorization.

221111194019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 32.

The spelling of 221111194019 in words is "two hundred twenty-one billion, one hundred eleven million, one hundred ninety-four thousand, nineteen".