2212511503561 has 2 divisors, whose sum is σ = 2212511503562. Its totient is φ = 2212511503560.

The previous prime is 2212511503507. The next prime is 2212511503577. The reversal of 2212511503561 is 1653051152122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2015037030400 + 197474473161 = 1419520^2 + 444381^2 .

It is a cyclic number.

It is not a de Polignac number, because 2212511503561 - 2²³ = 2212503114953 is a prime.

It is not a weakly prime, because it can be changed into another prime (2212511503361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1106255751780 + 1106255751781.

It is an arithmetic number, because the mean of its divisors is an integer number (1106255751781).

Almost surely, 2^{2212511503561} is an apocalyptic number.

It is an amenable number.

2212511503561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2212511503561 is an equidigital number, since it uses as much as digits as its factorization.

2212511503561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 34.

Adding to 2212511503561 its reverse (1653051152122), we get a palindrome (3865562655683).

The spelling of 2212511503561 in words is "two trillion, two hundred twelve billion, five hundred eleven million, five hundred three thousand, five hundred sixty-one".