212111102653 has 2 divisors, whose sum is σ = 212111102654. Its totient is φ = 212111102652.

The previous prime is 212111102597. The next prime is 212111102669. The reversal of 212111102653 is 356201111212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186440013369 + 25671089284 = 431787^2 + 160222^2 .

It is a cyclic number.

It is not a de Polignac number, because 212111102653 - 2¹⁷ = 212110971581 is a prime.

It is a super-2 number, since 2×212111102653² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212111102953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106055551326 + 106055551327.

It is an arithmetic number, because the mean of its divisors is an integer number (106055551327).

Almost surely, 2^212111102653 is an apocalyptic number.

It is an amenable number.

212111102653 is a deficient number, since it is larger than the sum of its proper divisors (1).

212111102653 is an equidigital number, since it uses as much as digits as its factorization.

212111102653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 25.

Adding to 212111102653 its reverse (356201111212), we get a palindrome (568312213865).

The spelling of 212111102653 in words is "two hundred twelve billion, one hundred eleven million, one hundred two thousand, six hundred fifty-three".