1213333121121 has 32 divisors (see below), whose sum is σ = 1798301554560. Its totient is φ = 721416883200.

The previous prime is 1213333121111. The next prime is 1213333121159. The reversal of 1213333121121 is 1211213333121.

It is not a de Polignac number, because 1213333121121 - 2³⁵ = 1178973382753 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1213333121091 and 1213333121100.

It is not an unprimeable number, because it can be changed into a prime (1213333121101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27768031 + ... + 27811691.

It is an arithmetic number, because the mean of its divisors is an integer number (56196923580).

Almost surely, 2^{1213333121121} is an apocalyptic number.

1213333121121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1213333121121 is a deficient number, since it is larger than the sum of its proper divisors (584968433439).

1213333121121 is a wasteful number, since it uses less digits than its factorization.

1213333121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59617.

The product of its digits is 648, while the sum is 24.

Adding to 1213333121121 its reverse (1211213333121), we get a palindrome (2424546454242).

The spelling of 1213333121121 in words is "one trillion, two hundred thirteen billion, three hundred thirty-three million, one hundred twenty-one thousand, one hundred twenty-one".