1201201111109 has 16 divisors (see below), whose sum is σ = 1305729384960. Its totient is φ = 1100832768000.

The previous prime is 1201201111091. The next prime is 1201201111127. The reversal of 1201201111109 is 9011111021021.

It is an interprime number because it is at equal distance from previous prime (1201201111091) and next prime (1201201111127).

It is a cyclic number.

It is not a de Polignac number, because 1201201111109 - 2²⁴ = 1201184333893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201201111129) 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, 1080389 + ... + 1889349.

It is an arithmetic number, because the mean of its divisors is an integer number (81608086560).

Almost surely, 2^{1201201111109} is an apocalyptic number.

1201201111109 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1201201111109 is a deficient number, since it is larger than the sum of its proper divisors (104528273851).

1201201111109 is a wasteful number, since it uses less digits than its factorization.

1201201111109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811532.

The product of its (nonzero) digits is 36, while the sum is 20.

The spelling of 1201201111109 in words is "one trillion, two hundred one billion, two hundred one million, one hundred eleven thousand, one hundred nine".