210012020173 has 2 divisors, whose sum is σ = 210012020174. Its totient is φ = 210012020172.

The previous prime is 210012020117. The next prime is 210012020219. The reversal of 210012020173 is 371020210012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164529206884 + 45482813289 = 405622^2 + 213267^2 .

It is a cyclic number.

It is not a de Polignac number, because 210012020173 - 2¹³ = 210012011981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210012020173.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210012020473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105006010086 + 105006010087.

It is an arithmetic number, because the mean of its divisors is an integer number (105006010087).

Almost surely, 2^210012020173 is an apocalyptic number.

It is an amenable number.

210012020173 is a deficient number, since it is larger than the sum of its proper divisors (1).

210012020173 is an equidigital number, since it uses as much as digits as its factorization.

210012020173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 19.

Adding to 210012020173 its reverse (371020210012), we get a palindrome (581032230185).

The spelling of 210012020173 in words is "two hundred ten billion, twelve million, twenty thousand, one hundred seventy-three".