210021212411 has 2 divisors, whose sum is σ = 210021212412. Its totient is φ = 210021212410.

The previous prime is 210021212407. The next prime is 210021212413. The reversal of 210021212411 is 114212120012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 210021212411 - 2² = 210021212407 is a prime.

Together with 210021212413, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210021212411.

It is not a weakly prime, because it can be changed into another prime (210021212413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105010606205 + 105010606206.

It is an arithmetic number, because the mean of its divisors is an integer number (105010606206).

Almost surely, 2^210021212411 is an apocalyptic number.

210021212411 is a deficient number, since it is larger than the sum of its proper divisors (1).

210021212411 is an equidigital number, since it uses as much as digits as its factorization.

210021212411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 210021212411 its reverse (114212120012), we get a palindrome (324233332423).

The spelling of 210021212411 in words is "two hundred ten billion, twenty-one million, two hundred twelve thousand, four hundred eleven".