221211001019 has 2 divisors, whose sum is σ = 221211001020. Its totient is φ = 221211001018.

The previous prime is 221211000931. The next prime is 221211001043. The reversal of 221211001019 is 910100112122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221211001019 - 2⁸ = 221211000763 is a prime.

It is a super-2 number, since 2×221211001019² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221211001049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110605500509 + 110605500510.

It is an arithmetic number, because the mean of its divisors is an integer number (110605500510).

Almost surely, 2^221211001019 is an apocalyptic number.

221211001019 is a deficient number, since it is larger than the sum of its proper divisors (1).

221211001019 is an equidigital number, since it uses as much as digits as its factorization.

221211001019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 221211001019 in words is "two hundred twenty-one billion, two hundred eleven million, one thousand, nineteen".