210361045021 has 4 divisors (see below), whose sum is σ = 210450906844. Its totient is φ = 210271183200.

The previous prime is 210361045009. The next prime is 210361045043. The reversal of 210361045021 is 120540163012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48765888900 + 161595156121 = 220830^2 + 401989^2 .

It is a cyclic number.

It is not a de Polignac number, because 210361045021 - 2¹¹ = 210361042973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210361045001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44927400 + ... + 44932081.

It is an arithmetic number, because the mean of its divisors is an integer number (52612726711).

Almost surely, 2^210361045021 is an apocalyptic number.

It is an amenable number.

210361045021 is a deficient number, since it is larger than the sum of its proper divisors (89861823).

210361045021 is an equidigital number, since it uses as much as digits as its factorization.

210361045021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89861822.

The product of its (nonzero) digits is 1440, while the sum is 25.

The spelling of 210361045021 in words is "two hundred ten billion, three hundred sixty-one million, forty-five thousand, twenty-one".