1012001043209 has 16 divisors (see below), whose sum is σ = 1101914440704. Its totient is φ = 923832984000.

The previous prime is 1012001043203. The next prime is 1012001043259. The reversal of 1012001043209 is 9023401002101.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012001043209 is a prime.

It is a super-2 number, since 2×1012001043209² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012001043203) 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, 686564 + ... + 1579674.

It is an arithmetic number, because the mean of its divisors is an integer number (68869652544).

Almost surely, 2^{1012001043209} is an apocalyptic number.

It is an amenable number.

1012001043209 is a deficient number, since it is larger than the sum of its proper divisors (89913397495).

1012001043209 is a wasteful number, since it uses less digits than its factorization.

1012001043209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894088.

The product of its (nonzero) digits is 432, while the sum is 23.

The spelling of 1012001043209 in words is "one trillion, twelve billion, one million, forty-three thousand, two hundred nine".