221012019953 has 2 divisors, whose sum is σ = 221012019954. Its totient is φ = 221012019952.

The previous prime is 221012019937. The next prime is 221012019967. The reversal of 221012019953 is 359910210122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143180505664 + 77831514289 = 378392^2 + 278983^2 .

It is a cyclic number.

It is not a de Polignac number, because 221012019953 - 2⁴ = 221012019937 is a prime.

It is not a weakly prime, because it can be changed into another prime (221012019853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110506009976 + 110506009977.

It is an arithmetic number, because the mean of its divisors is an integer number (110506009977).

Almost surely, 2^221012019953 is an apocalyptic number.

It is an amenable number.

221012019953 is a deficient number, since it is larger than the sum of its proper divisors (1).

221012019953 is an equidigital number, since it uses as much as digits as its factorization.

221012019953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 35.

The spelling of 221012019953 in words is "two hundred twenty-one billion, twelve million, nineteen thousand, nine hundred fifty-three".