212363620561 has 2 divisors, whose sum is σ = 212363620562. Its totient is φ = 212363620560.

The previous prime is 212363620537. The next prime is 212363620571. The reversal of 212363620561 is 165026363212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207840251025 + 4523369536 = 455895^2 + 67256^2 .

It is a cyclic number.

It is not a de Polignac number, because 212363620561 - 2⁵ = 212363620529 is a prime.

It is a super-3 number, since 3×212363620561³ (a number of 35 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212363620561.

It is not a weakly prime, because it can be changed into another prime (212363620571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106181810280 + 106181810281.

It is an arithmetic number, because the mean of its divisors is an integer number (106181810281).

Almost surely, 2^212363620561 is an apocalyptic number.

It is an amenable number.

212363620561 is a deficient number, since it is larger than the sum of its proper divisors (1).

212363620561 is an equidigital number, since it uses as much as digits as its factorization.

212363620561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 37.

Adding to 212363620561 its reverse (165026363212), we get a palindrome (377389983773).

The spelling of 212363620561 in words is "two hundred twelve billion, three hundred sixty-three million, six hundred twenty thousand, five hundred sixty-one".