11220851 has 2 divisors, whose sum is σ = 11220852. Its totient is φ = 11220850.

The previous prime is 11220841. The next prime is 11220857. The reversal of 11220851 is 15802211.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11220851 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (11220857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610425 + 5610426.

It is an arithmetic number, because the mean of its divisors is an integer number (5610426).

Almost surely, 2^11220851 is an apocalyptic number.

11220851 is a deficient number, since it is larger than the sum of its proper divisors (1).

11220851 is an equidigital number, since it uses as much as digits as its factorization.

11220851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 11220851 is about 3349.7538715553. The cubic root of 11220851 is about 223.8765462907.

The spelling of 11220851 in words is "eleven million, two hundred twenty thousand, eight hundred fifty-one".