63279012221 has 2 divisors, whose sum is σ = 63279012222. Its totient is φ = 63279012220.

The previous prime is 63279012211. The next prime is 63279012233. The reversal of 63279012221 is 12221097236.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54060900100 + 9218112121 = 232510^2 + 96011^2 .

It is a cyclic number.

It is not a de Polignac number, because 63279012221 - 2⁶ = 63279012157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63279012211) 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, 31639506110 + 31639506111.

It is an arithmetic number, because the mean of its divisors is an integer number (31639506111).

Almost surely, 2^63279012221 is an apocalyptic number.

It is an amenable number.

63279012221 is a deficient number, since it is larger than the sum of its proper divisors (1).

63279012221 is an equidigital number, since it uses as much as digits as its factorization.

63279012221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 35.

The spelling of 63279012221 in words is "sixty-three billion, two hundred seventy-nine million, twelve thousand, two hundred twenty-one".