210010022021 has 4 divisors (see below), whose sum is σ = 210068151852. Its totient is φ = 209951892192.

The previous prime is 210010022003. The next prime is 210010022051. The reversal of 210010022021 is 120220010012.

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 106676704996 + 103333317025 = 326614^2 + 321455^2 .

It is a cyclic number.

It is not a de Polignac number, because 210010022021 - 2¹⁴ = 210010005637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210010021993 and 210010022011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210010022051) 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, 29059496 + ... + 29066721.

It is an arithmetic number, because the mean of its divisors is an integer number (52517037963).

Almost surely, 2^210010022021 is an apocalyptic number.

It is an amenable number.

210010022021 is a deficient number, since it is larger than the sum of its proper divisors (58129831).

210010022021 is an equidigital number, since it uses as much as digits as its factorization.

210010022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58129830.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 210010022021 its reverse (120220010012), we get a palindrome (330230032033).

The spelling of 210010022021 in words is "two hundred ten billion, ten million, twenty-two thousand, twenty-one".