11212001 has 2 divisors, whose sum is σ = 11212002. Its totient is φ = 11212000.

The previous prime is 11211989. The next prime is 11212013. The reversal of 11212001 is 10021211.

It is a balanced prime because it is at equal distance from previous prime (11211989) and next prime (11212013).

It can be written as a sum of positive squares in only one way, i.e., 6477025 + 4734976 = 2545^2 + 2176^2 .

It is a cyclic number.

It is not a de Polignac number, because 11212001 - 2²² = 7017697 is a prime.

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 11212001.

It is not a weakly prime, because it can be changed into another prime (11212051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606000 + 5606001.

It is an arithmetic number, because the mean of its divisors is an integer number (5606001).

Almost surely, 2^11212001 is an apocalyptic number.

It is an amenable number.

11212001 is a deficient number, since it is larger than the sum of its proper divisors (1).

11212001 is an equidigital number, since it uses as much as digits as its factorization.

11212001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 11212001 is about 3348.4326184052. The cubic root of 11212001 is about 223.8176729024.

Adding to 11212001 its reverse (10021211), we get a palindrome (21233212).

The spelling of 11212001 in words is "eleven million, two hundred twelve thousand, one".