1220546011 has 4 divisors (see below), whose sum is σ = 1240555024. Its totient is φ = 1200537000.

The previous prime is 1220546009. The next prime is 1220546071. The reversal of 1220546011 is 1106450221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1220546011 - 2¹ = 1220546009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220546071) 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 3 ways as a sum of consecutive naturals, for example, 10004415 + ... + 10004536.

It is an arithmetic number, because the mean of its divisors is an integer number (310138756).

Almost surely, 2^1220546011 is an apocalyptic number.

1220546011 is a deficient number, since it is larger than the sum of its proper divisors (20009013).

1220546011 is an equidigital number, since it uses as much as digits as its factorization.

1220546011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20009012.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1220546011 is about 34936.3136435429. The cubic root of 1220546011 is about 1068.6891132009.

Adding to 1220546011 its reverse (1106450221), we get a palindrome (2326996232).

The spelling of 1220546011 in words is "one billion, two hundred twenty million, five hundred forty-six thousand, eleven".