1021010100209 has 4 divisors (see below), whose sum is σ = 1113829200240. Its totient is φ = 928191000180.

The previous prime is 1021010100197. The next prime is 1021010100233. The reversal of 1021010100209 is 9020010101201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1021010100209 - 2²⁸ = 1020741664753 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1021010105209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46409549999 + ... + 46409550020.

It is an arithmetic number, because the mean of its divisors is an integer number (278457300060).

Almost surely, 2^{1021010100209} is an apocalyptic number.

It is an amenable number.

1021010100209 is a deficient number, since it is larger than the sum of its proper divisors (92819100031).

1021010100209 is an equidigital number, since it uses as much as digits as its factorization.

1021010100209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92819100030.

The product of its (nonzero) digits is 36, while the sum is 17.

The spelling of 1021010100209 in words is "one trillion, twenty-one billion, ten million, one hundred thousand, two hundred nine".