1121002020209 has 4 divisors (see below), whose sum is σ = 1121011697520. Its totient is φ = 1120992342900.

The previous prime is 1121002020197. The next prime is 1121002020223. The reversal of 1121002020209 is 9020202001211.

It is a happy number.

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 1121002020209 - 2⁸ = 1121002019953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121002020269) 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, 4662767 + ... + 4897284.

It is an arithmetic number, because the mean of its divisors is an integer number (280252924380).

Almost surely, 2^{1121002020209} is an apocalyptic number.

It is an amenable number.

1121002020209 is a deficient number, since it is larger than the sum of its proper divisors (9677311).

1121002020209 is an equidigital number, since it uses as much as digits as its factorization.

1121002020209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9677310.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 1121002020209 in words is "one trillion, one hundred twenty-one billion, two million, twenty thousand, two hundred nine".