1222656211 has 16 divisors (see below), whose sum is σ = 1455114240. Its totient is φ = 1005127200.

The previous prime is 1222656209. The next prime is 1222656263. The reversal of 1222656211 is 1126562221.

It is not a de Polignac number, because 1222656211 - 2¹ = 1222656209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1222656211.

It is not an unprimeable number, because it can be changed into a prime (1222659211) 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 in 15 ways as a sum of consecutive naturals, for example, 10710 + ... + 50596.

It is an arithmetic number, because the mean of its divisors is an integer number (90944640).

Almost surely, 2^1222656211 is an apocalyptic number.

1222656211 is a deficient number, since it is larger than the sum of its proper divisors (232458029).

1222656211 is a wasteful number, since it uses less digits than its factorization.

1222656211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40074.

The product of its digits is 2880, while the sum is 28.

The square root of 1222656211 is about 34966.5012690718. The cubic root of 1222656211 is about 1069.3046435599.

The spelling of 1222656211 in words is "one billion, two hundred twenty-two million, six hundred fifty-six thousand, two hundred eleven".