812001211 has 4 divisors (see below), whose sum is σ = 928001392. Its totient is φ = 696001032.

The previous prime is 812001193. The next prime is 812001257. The reversal of 812001211 is 112100218.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112100218 = 2 ⋅56050109.

It is a cyclic number.

It is not a de Polignac number, because 812001211 - 2¹¹ = 811999163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (812001611) 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, 58000080 + ... + 58000093.

It is an arithmetic number, because the mean of its divisors is an integer number (232000348).

Almost surely, 2^812001211 is an apocalyptic number.

812001211 is a deficient number, since it is larger than the sum of its proper divisors (116000181).

812001211 is a wasteful number, since it uses less digits than its factorization.

812001211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116000180.

The product of its (nonzero) digits is 32, while the sum is 16.

The square root of 812001211 is about 28495.6349464264. The cubic root of 812001211 is about 932.9368028857.

Adding to 812001211 its reverse (112100218), we get a palindrome (924101429).

The spelling of 812001211 in words is "eight hundred twelve million, one thousand, two hundred eleven".