63212541421 has 2 divisors, whose sum is σ = 63212541422. Its totient is φ = 63212541420.

The previous prime is 63212541323. The next prime is 63212541443. The reversal of 63212541421 is 12414521236.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42184641321 + 21027900100 = 205389^2 + 145010^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63212541421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63212545421) 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, 31606270710 + 31606270711.

It is an arithmetic number, because the mean of its divisors is an integer number (31606270711).

Almost surely, 2^63212541421 is an apocalyptic number.

It is an amenable number.

63212541421 is a deficient number, since it is larger than the sum of its proper divisors (1).

63212541421 is an equidigital number, since it uses as much as digits as its factorization.

63212541421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 31.

The spelling of 63212541421 in words is "sixty-three billion, two hundred twelve million, five hundred forty-one thousand, four hundred twenty-one".