11220651 has 24 divisors (see below), whose sum is σ = 18061680. Its totient is φ = 6664896.

The previous prime is 11220647. The next prime is 11220653. The reversal of 11220651 is 15602211.

11220651 is a `hidden beast` number, since 1 + 12 + 2 + 0 + 651 = 666.

It is not a de Polignac number, because 11220651 - 2² = 11220647 is a prime.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (11220653) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1740 + ... + 5046.

It is an arithmetic number, because the mean of its divisors is an integer number (752570).

Almost surely, 2^11220651 is an apocalyptic number.

11220651 is a deficient number, since it is larger than the sum of its proper divisors (6841029).

11220651 is a wasteful number, since it uses less digits than its factorization.

11220651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3355 (or 3352 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 11220651 is about 3349.7240184827. The cubic root of 11220651 is about 223.8752161606.

Adding to 11220651 its reverse (15602211), we get a palindrome (26822862).

The spelling of 11220651 in words is "eleven million, two hundred twenty thousand, six hundred fifty-one".