1202111112009 has 4 divisors (see below), whose sum is σ = 1602814816016. Its totient is φ = 801407408004.

The previous prime is 1202111111941. The next prime is 1202111112053. The reversal of 1202111112009 is 9002111112021.

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 not a de Polignac number, because 1202111112009 - 2¹⁵ = 1202111079241 is a prime.

It is a super-2 number, since 2×1202111112009² (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 (1202111112089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200351851999 + ... + 200351852004.

It is an arithmetic number, because the mean of its divisors is an integer number (400703704004).

Almost surely, 2^{1202111112009} is an apocalyptic number.

It is an amenable number.

1202111112009 is a deficient number, since it is larger than the sum of its proper divisors (400703704007).

1202111112009 is an equidigital number, since it uses as much as digits as its factorization.

1202111112009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400703704006.

The product of its (nonzero) digits is 72, while the sum is 21.

The spelling of 1202111112009 in words is "one trillion, two hundred two billion, one hundred eleven million, one hundred twelve thousand, nine".