2021210001211 has 4 divisors (see below), whose sum is σ = 2021230351800. Its totient is φ = 2021189650624.

The previous prime is 2021210001137. The next prime is 2021210001221. The reversal of 2021210001211 is 1121000121202.

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

It is a cyclic number.

It is not a de Polignac number, because 2021210001211 - 2¹¹ = 2021209999163 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021210001191 and 2021210001200.

It is not an unprimeable number, because it can be changed into a prime (2021210001221) 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, 10025581 + ... + 10225198.

It is an arithmetic number, because the mean of its divisors is an integer number (505307587950).

Almost surely, 2^{2021210001211} is an apocalyptic number.

2021210001211 is a deficient number, since it is larger than the sum of its proper divisors (20350589).

2021210001211 is an equidigital number, since it uses as much as digits as its factorization.

2021210001211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20350588.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2021210001211 its reverse (1121000121202), we get a palindrome (3142210122413).

The spelling of 2021210001211 in words is "two trillion, twenty-one billion, two hundred ten million, one thousand, two hundred eleven".