221242201051 has 2 divisors, whose sum is σ = 221242201052. Its totient is φ = 221242201050.

The previous prime is 221242200997. The next prime is 221242201123. The reversal of 221242201051 is 150102242122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221242201051 - 2⁷ = 221242200923 is a prime.

It is a super-2 number, since 2×221242201051² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221242207051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110621100525 + 110621100526.

It is an arithmetic number, because the mean of its divisors is an integer number (110621100526).

Almost surely, 2^221242201051 is an apocalyptic number.

221242201051 is a deficient number, since it is larger than the sum of its proper divisors (1).

221242201051 is an equidigital number, since it uses as much as digits as its factorization.

221242201051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 221242201051 its reverse (150102242122), we get a palindrome (371344443173).

The spelling of 221242201051 in words is "two hundred twenty-one billion, two hundred forty-two million, two hundred one thousand, fifty-one".