210121252001 has 2 divisors, whose sum is σ = 210121252002. Its totient is φ = 210121252000.

The previous prime is 210121251979. The next prime is 210121252043. The reversal of 210121252001 is 100252121012.

210121252001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 189813576976 + 20307675025 = 435676^2 + 142505^2 .

It is a cyclic number.

It is not a de Polignac number, because 210121252001 - 2¹⁴ = 210121235617 is a prime.

It is not a weakly prime, because it can be changed into another prime (210127252001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105060626000 + 105060626001.

It is an arithmetic number, because the mean of its divisors is an integer number (105060626001).

Almost surely, 2^210121252001 is an apocalyptic number.

It is an amenable number.

210121252001 is a deficient number, since it is larger than the sum of its proper divisors (1).

210121252001 is an equidigital number, since it uses as much as digits as its factorization.

210121252001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 210121252001 its reverse (100252121012), we get a palindrome (310373373013).

The spelling of 210121252001 in words is "two hundred ten billion, one hundred twenty-one million, two hundred fifty-two thousand, one".