210210012022021 has 4 divisors (see below), whose sum is σ = 229320013114944. Its totient is φ = 191100010929100.

The previous prime is 210210012022007. The next prime is 210210012022037. The reversal of 210210012022021 is 120220210012012.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 210210012022021 - 2¹³ = 210210012013829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210210012021986 and 210210012022004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210210012023021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9555000546445 + ... + 9555000546466.

It is an arithmetic number, because the mean of its divisors is an integer number (57330003278736).

Almost surely, 2^{210210012022021} is an apocalyptic number.

It is an amenable number.

210210012022021 is a deficient number, since it is larger than the sum of its proper divisors (19110001092923).

210210012022021 is a wasteful number, since it uses less digits than its factorization.

210210012022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19110001092922.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 210210012022021 its reverse (120220210012012), we get a palindrome (330430222034033).

The spelling of 210210012022021 in words is "two hundred ten trillion, two hundred ten billion, twelve million, twenty-two thousand, twenty-one".