221212013328937 has 2 divisors, whose sum is σ = 221212013328938. Its totient is φ = 221212013328936.

The previous prime is 221212013328853. The next prime is 221212013328941. The reversal of 221212013328937 is 739823310212122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220548161546496 + 663851782441 = 14850864^2 + 814771^2 .

It is a cyclic number.

It is not a de Polignac number, because 221212013328937 - 2⁷ = 221212013328809 is a prime.

It is not a weakly prime, because it can be changed into another prime (221212013328967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110606006664468 + 110606006664469.

It is an arithmetic number, because the mean of its divisors is an integer number (110606006664469).

Almost surely, 2^{221212013328937} is an apocalyptic number.

It is an amenable number.

221212013328937 is a deficient number, since it is larger than the sum of its proper divisors (1).

221212013328937 is an equidigital number, since it uses as much as digits as its factorization.

221212013328937 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 46.

The spelling of 221212013328937 in words is "two hundred twenty-one trillion, two hundred twelve billion, thirteen million, three hundred twenty-eight thousand, nine hundred thirty-seven".