12212131221131 has 4 divisors (see below), whose sum is σ = 12471963800352. Its totient is φ = 11952298641912.

The previous prime is 12212131221083. The next prime is 12212131221137. The reversal of 12212131221131 is 13112213121221.

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 12212131221131 - 2⁴² = 7814084710027 is a prime.

It is a super-2 number, since 2×12212131221131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12212131221097 and 12212131221106.

It is not an unprimeable number, because it can be changed into a prime (12212131221137) 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, 129916289540 + ... + 129916289633.

It is an arithmetic number, because the mean of its divisors is an integer number (3117990950088).

Almost surely, 2^{12212131221131} is an apocalyptic number.

12212131221131 is a deficient number, since it is larger than the sum of its proper divisors (259832579221).

12212131221131 is an equidigital number, since it uses as much as digits as its factorization.

12212131221131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259832579220.

The product of its digits is 288, while the sum is 23.

Adding to 12212131221131 its reverse (13112213121221), we get a palindrome (25324344342352).

The spelling of 12212131221131 in words is "twelve trillion, two hundred twelve billion, one hundred thirty-one million, two hundred twenty-one thousand, one hundred thirty-one".