210444364121 has 2 divisors, whose sum is σ = 210444364122. Its totient is φ = 210444364120.

The previous prime is 210444364093. The next prime is 210444364189. The reversal of 210444364121 is 121463444012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204417015625 + 6027348496 = 452125^2 + 77636^2 .

It is a cyclic number.

It is not a de Polignac number, because 210444364121 - 2³⁰ = 209370622297 is a prime.

It is not a weakly prime, because it can be changed into another prime (210444364321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105222182060 + 105222182061.

It is an arithmetic number, because the mean of its divisors is an integer number (105222182061).

Almost surely, 2^210444364121 is an apocalyptic number.

It is an amenable number.

210444364121 is a deficient number, since it is larger than the sum of its proper divisors (1).

210444364121 is an equidigital number, since it uses as much as digits as its factorization.

210444364121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 32.

The spelling of 210444364121 in words is "two hundred ten billion, four hundred forty-four million, three hundred sixty-four thousand, one hundred twenty-one".