11212021020173 has 2 divisors, whose sum is σ = 11212021020174. Its totient is φ = 11212021020172.

The previous prime is 11212021020163. The next prime is 11212021020247. The reversal of 11212021020173 is 37102012021211.

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., 9607879716964 + 1604141303209 = 3099658^2 + 1266547^2 .

It is a cyclic number.

It is not a de Polignac number, because 11212021020173 - 2¹⁶ = 11212020954637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11212021020163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606010510086 + 5606010510087.

It is an arithmetic number, because the mean of its divisors is an integer number (5606010510087).

Almost surely, 2^{11212021020173} is an apocalyptic number.

It is an amenable number.

11212021020173 is a deficient number, since it is larger than the sum of its proper divisors (1).

11212021020173 is an equidigital number, since it uses as much as digits as its factorization.

11212021020173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 23.

Adding to 11212021020173 its reverse (37102012021211), we get a palindrome (48314033041384).

The spelling of 11212021020173 in words is "eleven trillion, two hundred twelve billion, twenty-one million, twenty thousand, one hundred seventy-three".