211226401 has 12 divisors (see below), whose sum is σ = 230292400. Its totient is φ = 193194288.

The previous prime is 211226399. The next prime is 211226419. The reversal of 211226401 is 104622112.

It is not a de Polignac number, because 211226401 - 2¹ = 211226399 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211226441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9370 + ... + 22588.

Almost surely, 2^211226401 is an apocalyptic number.

It is an amenable number.

211226401 is a deficient number, since it is larger than the sum of its proper divisors (19065999).

211226401 is a wasteful number, since it uses less digits than its factorization.

211226401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13296 (or 13267 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 211226401 is about 14533.6300007947. The cubic root of 211226401 is about 595.5470345134.

Adding to 211226401 its reverse (104622112), we get a palindrome (315848513).

The spelling of 211226401 in words is "two hundred eleven million, two hundred twenty-six thousand, four hundred one".