210001121102501 has 2 divisors, whose sum is σ = 210001121102502. Its totient is φ = 210001121102500.

The previous prime is 210001121102453. The next prime is 210001121102533. The reversal of 210001121102501 is 105201121100012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125800787049025 + 84200334053476 = 11216095^2 + 9176074^2 .

It is a cyclic number.

It is not a de Polignac number, because 210001121102501 - 2⁴⁶ = 139632376924837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210001121102501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210001121108501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105000560551250 + 105000560551251.

It is an arithmetic number, because the mean of its divisors is an integer number (105000560551251).

Almost surely, 2^{210001121102501} is an apocalyptic number.

It is an amenable number.

210001121102501 is a deficient number, since it is larger than the sum of its proper divisors (1).

210001121102501 is an equidigital number, since it uses as much as digits as its factorization.

210001121102501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40, while the sum is 17.

Adding to 210001121102501 its reverse (105201121100012), we get a palindrome (315202242202513).

The spelling of 210001121102501 in words is "two hundred ten trillion, one billion, one hundred twenty-one million, one hundred two thousand, five hundred one".