210111202101973 has 2 divisors, whose sum is σ = 210111202101974. Its totient is φ = 210111202101972.

The previous prime is 210111202101901. The next prime is 210111202102037. The reversal of 210111202101973 is 379101202111012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209754450341604 + 356751760369 = 14482902^2 + 597287^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210111202101973 is a prime.

It is a super-2 number, since 2×210111202101973² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210111202501973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105055601050986 + 105055601050987.

It is an arithmetic number, because the mean of its divisors is an integer number (105055601050987).

Almost surely, 2^{210111202101973} is an apocalyptic number.

It is an amenable number.

210111202101973 is a deficient number, since it is larger than the sum of its proper divisors (1).

210111202101973 is an equidigital number, since it uses as much as digits as its factorization.

210111202101973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 31.

Adding to 210111202101973 its reverse (379101202111012), we get a palindrome (589212404212985).

The spelling of 210111202101973 in words is "two hundred ten trillion, one hundred eleven billion, two hundred two million, one hundred one thousand, nine hundred seventy-three".