1210020002009 has 16 divisors (see below), whose sum is σ = 1576858647168. Its totient is φ = 901062081792.

The previous prime is 1210020001991. The next prime is 1210020002011. The reversal of 1210020002009 is 9002000200121.

It is a cyclic number.

It is not a de Polignac number, because 1210020002009 - 2²⁸ = 1209751566553 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1210020002089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 391084427 + ... + 391087520.

It is an arithmetic number, because the mean of its divisors is an integer number (98553665448).

Almost surely, 2^{1210020002009} is an apocalyptic number.

It is an amenable number.

1210020002009 is a deficient number, since it is larger than the sum of its proper divisors (366838645159).

1210020002009 is a wasteful number, since it uses less digits than its factorization.

1210020002009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782171984.

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

The spelling of 1210020002009 in words is "one trillion, two hundred ten billion, twenty million, two thousand, nine".