21010201211 has 8 divisors (see below), whose sum is σ = 21080120400. Its totient is φ = 20940398752.

The previous prime is 21010201193. The next prime is 21010201229. The reversal of 21010201211 is 11210201012.

It is an interprime number because it is at equal distance from previous prime (21010201193) and next prime (21010201229).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21010201211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21010201192 and 21010201201.

It is not an unprimeable number, because it can be changed into a prime (21010201241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 339065 + ... + 396213.

It is an arithmetic number, because the mean of its divisors is an integer number (2635015050).

Almost surely, 2^21010201211 is an apocalyptic number.

21010201211 is a deficient number, since it is larger than the sum of its proper divisors (69919189).

21010201211 is an equidigital number, since it uses as much as digits as its factorization.

21010201211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58365.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21010201211 its reverse (11210201012), we get a palindrome (32220402223).

The spelling of 21010201211 in words is "twenty-one billion, ten million, two hundred one thousand, two hundred eleven".