1222654211 has 4 divisors (see below), whose sum is σ = 1222733400. Its totient is φ = 1222575024.

The previous prime is 1222654189. The next prime is 1222654231. The reversal of 1222654211 is 1124562221.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1124562221 = 1579 ⋅712199.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222654211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222654231) 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 3 ways as a sum of consecutive naturals, for example, 8066 + ... + 50103.

It is an arithmetic number, because the mean of its divisors is an integer number (305683350).

Almost surely, 2^1222654211 is an apocalyptic number.

1222654211 is a deficient number, since it is larger than the sum of its proper divisors (79189).

1222654211 is an equidigital number, since it uses as much as digits as its factorization.

1222654211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79188.

The product of its digits is 1920, while the sum is 26.

The square root of 1222654211 is about 34966.4726702594. The cubic root of 1222654211 is about 1069.3040605095.

The spelling of 1222654211 in words is "one billion, two hundred twenty-two million, six hundred fifty-four thousand, two hundred eleven".