5211561021049 has 2 divisors, whose sum is σ = 5211561021050. Its totient is φ = 5211561021048.

The previous prime is 5211561021031. The next prime is 5211561021089. The reversal of 5211561021049 is 9401201651125.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5080096764649 + 131464256400 = 2253907^2 + 362580^2 .

It is a cyclic number.

It is not a de Polignac number, because 5211561021049 - 2⁹ = 5211561020537 is a prime.

It is a super-2 number, since 2×5211561021049² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 5211561020999 and 5211561021017.

It is not a weakly prime, because it can be changed into another prime (5211561021089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2605780510524 + 2605780510525.

It is an arithmetic number, because the mean of its divisors is an integer number (2605780510525).

Almost surely, 2^{5211561021049} is an apocalyptic number.

It is an amenable number.

5211561021049 is a deficient number, since it is larger than the sum of its proper divisors (1).

5211561021049 is an equidigital number, since it uses as much as digits as its factorization.

5211561021049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 37.

The spelling of 5211561021049 in words is "five trillion, two hundred eleven billion, five hundred sixty-one million, twenty-one thousand, forty-nine".