12021011011331 has 4 divisors (see below), whose sum is σ = 13738298298672. Its totient is φ = 10303723723992.

The previous prime is 12021011011297. The next prime is 12021011011381. The reversal of 12021011011331 is 13311011012021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12021011011331 - 2⁶ = 12021011011267 is a prime.

It is a super-3 number, since 3×12021011011331³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12021011011381) 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, 858643643660 + ... + 858643643673.

It is an arithmetic number, because the mean of its divisors is an integer number (3434574574668).

Almost surely, 2^{12021011011331} is an apocalyptic number.

12021011011331 is a deficient number, since it is larger than the sum of its proper divisors (1717287287341).

12021011011331 is an equidigital number, since it uses as much as digits as its factorization.

12021011011331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1717287287340.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 12021011011331 its reverse (13311011012021), we get a palindrome (25332022023352).

The spelling of 12021011011331 in words is "twelve trillion, twenty-one billion, eleven million, eleven thousand, three hundred thirty-one".