221211010051 has 2 divisors, whose sum is σ = 221211010052. Its totient is φ = 221211010050.

The previous prime is 221211009991. The next prime is 221211010157. The reversal of 221211010051 is 150010112122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221211010051 - 2⁷ = 221211009923 is a prime.

It is not a weakly prime, because it can be changed into another prime (221211011051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110605505025 + 110605505026.

It is an arithmetic number, because the mean of its divisors is an integer number (110605505026).

Almost surely, 2^221211010051 is an apocalyptic number.

221211010051 is a deficient number, since it is larger than the sum of its proper divisors (1).

221211010051 is an equidigital number, since it uses as much as digits as its factorization.

221211010051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40, while the sum is 16.

Adding to 221211010051 its reverse (150010112122), we get a palindrome (371221122173).

The spelling of 221211010051 in words is "two hundred twenty-one billion, two hundred eleven million, ten thousand, fifty-one".