1222210649 has 4 divisors (see below), whose sum is σ = 1333320720. Its totient is φ = 1111100580.

The previous prime is 1222210643. The next prime is 1222210657. The reversal of 1222210649 is 9460122221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222210649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222210643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55555019 + ... + 55555040.

It is an arithmetic number, because the mean of its divisors is an integer number (333330180).

Almost surely, 2^1222210649 is an apocalyptic number.

It is an amenable number.

1222210649 is a deficient number, since it is larger than the sum of its proper divisors (111110071).

1222210649 is a wasteful number, since it uses less digits than its factorization.

1222210649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111110070.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 1222210649 is about 34960.1294190968. The cubic root of 1222210649 is about 1069.1747353054.

The spelling of 1222210649 in words is "one billion, two hundred twenty-two million, two hundred ten thousand, six hundred forty-nine".