1020210009 has 32 divisors (see below), whose sum is σ = 1678467840. Its totient is φ = 536758272.

The previous prime is 1020209987. The next prime is 1020210019. The reversal of 1020210009 is 9000120201.

It is a happy number.

It is not a de Polignac number, because 1020210009 - 2⁹ = 1020209497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1020210009.

It is not an unprimeable number, because it can be changed into a prime (1020210019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 107089 + ... + 116225.

It is an arithmetic number, because the mean of its divisors is an integer number (52452120).

Almost surely, 2^1020210009 is an apocalyptic number.

It is an amenable number.

1020210009 is a deficient number, since it is larger than the sum of its proper divisors (658257831).

1020210009 is a wasteful number, since it uses less digits than its factorization.

1020210009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9569.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1020210009 is about 31940.7264945555. The cubic root of 1020210009 is about 1006.6917897306.

The spelling of 1020210009 in words is "one billion, twenty million, two hundred ten thousand, nine".