1220022009 has 12 divisors (see below), whose sum is σ = 1767250836. Its totient is φ = 811041792.

The previous prime is 1220021989. The next prime is 1220022029. The reversal of 1220022009 is 9002200221.

It is an interprime number because it is at equal distance from previous prime (1220021989) and next prime (1220022029).

It can be written as a sum of positive squares in 2 ways, for example, as 394896384 + 825125625 = 19872^2 + 28725^2 .

It is not a de Polignac number, because 1220022009 - 2⁹ = 1220021497 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220021982 and 1220022000.

It is not an unprimeable number, because it can be changed into a prime (1220022029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 188832 + ... + 195185.

It is an arithmetic number, because the mean of its divisors is an integer number (147270903).

Almost surely, 2^1220022009 is an apocalyptic number.

It is an amenable number.

1220022009 is a deficient number, since it is larger than the sum of its proper divisors (547228827).

1220022009 is a wasteful number, since it uses less digits than its factorization.

1220022009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384376 (or 384373 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1220022009 is about 34928.8134496435. The cubic root of 1220022009 is about 1068.5361555941.

The spelling of 1220022009 in words is "one billion, two hundred twenty million, twenty-two thousand, nine".