1020122009 has 8 divisors (see below), whose sum is σ = 1117375560. Its totient is φ = 927006976.

The previous prime is 1020122003. The next prime is 1020122029. The reversal of 1020122009 is 9002210201.

It can be written as a sum of positive squares in 4 ways, for example, as 645312409 + 374809600 = 25403^2 + 19360^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020122009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020122003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1034114 + ... + 1035099.

It is an arithmetic number, because the mean of its divisors is an integer number (139671945).

Almost surely, 2^1020122009 is an apocalyptic number.

It is an amenable number.

1020122009 is a deficient number, since it is larger than the sum of its proper divisors (97253551).

1020122009 is a wasteful number, since it uses less digits than its factorization.

1020122009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2069259.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1020122009 is about 31939.3489132136. The cubic root of 1020122009 is about 1006.6628442443.

The spelling of 1020122009 in words is "one billion, twenty million, one hundred twenty-two thousand, nine".