12131233311021 has 16 divisors (see below), whose sum is σ = 18020864959488. Its totient is φ = 7195831492400.

The previous prime is 12131233311011. The next prime is 12131233311047. The reversal of 12131233311021 is 12011333213121.

It is a cyclic number.

It is not a de Polignac number, because 12131233311021 - 2¹⁰ = 12131233309997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12131233310982 and 12131233311000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131233311011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3910776435 + ... + 3910779536.

It is an arithmetic number, because the mean of its divisors is an integer number (1126304059968).

Almost surely, 2^{12131233311021} is an apocalyptic number.

12131233311021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12131233311021 is a deficient number, since it is larger than the sum of its proper divisors (5889631648467).

12131233311021 is a wasteful number, since it uses less digits than its factorization.

12131233311021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7821556032.

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

Adding to 12131233311021 its reverse (12011333213121), we get a palindrome (24142566524142).

The spelling of 12131233311021 in words is "twelve trillion, one hundred thirty-one billion, two hundred thirty-three million, three hundred eleven thousand, twenty-one".