5619556901221 has 2 divisors, whose sum is σ = 5619556901222. Its totient is φ = 5619556901220.

The previous prime is 5619556901149. The next prime is 5619556901303. The reversal of 5619556901221 is 1221096559165.

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., 5289494012100 + 330062889121 = 2299890^2 + 574511^2 .

It is a cyclic number.

It is not a de Polignac number, because 5619556901221 - 2⁹ = 5619556900709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5619056901221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2809778450610 + 2809778450611.

It is an arithmetic number, because the mean of its divisors is an integer number (2809778450611).

Almost surely, 2^{5619556901221} is an apocalyptic number.

It is an amenable number.

5619556901221 is a deficient number, since it is larger than the sum of its proper divisors (1).

5619556901221 is an equidigital number, since it uses as much as digits as its factorization.

5619556901221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458000, while the sum is 52.

The spelling of 5619556901221 in words is "five trillion, six hundred nineteen billion, five hundred fifty-six million, nine hundred one thousand, two hundred twenty-one".