1236194421121 has 24 divisors (see below), whose sum is σ = 1454067916992. Its totient is φ = 1040275605600.

The previous prime is 1236194421109. The next prime is 1236194421127. The reversal of 1236194421121 is 1211244916321.

It is not a de Polignac number, because 1236194421121 - 2³³ = 1227604486529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1236194421127) 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 23 ways as a sum of consecutive naturals, for example, 2299086 + ... + 2785351.

It is an arithmetic number, because the mean of its divisors is an integer number (60586163208).

Almost surely, 2^{1236194421121} is an apocalyptic number.

1236194421121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1236194421121 is a deficient number, since it is larger than the sum of its proper divisors (217873495871).

1236194421121 is a wasteful number, since it uses less digits than its factorization.

1236194421121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5084533 (or 5084502 counting only the distinct ones).

The product of its digits is 20736, while the sum is 37.

The spelling of 1236194421121 in words is "one trillion, two hundred thirty-six billion, one hundred ninety-four million, four hundred twenty-one thousand, one hundred twenty-one".