1221132020131 has 2 divisors, whose sum is σ = 1221132020132. Its totient is φ = 1221132020130.

The previous prime is 1221132020113. The next prime is 1221132020153. The reversal of 1221132020131 is 1310202311221.

Together with previous prime (1221132020113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221132020131 - 2³⁹ = 671376206243 is a prime.

It is a super-2 number, since 2×1221132020131² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221132020099 and 1221132020108.

It is not a weakly prime, because it can be changed into another prime (1221132020191) 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 as a sum of consecutive naturals, namely, 610566010065 + 610566010066.

It is an arithmetic number, because the mean of its divisors is an integer number (610566010066).

Almost surely, 2^{1221132020131} is an apocalyptic number.

1221132020131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221132020131 is an equidigital number, since it uses as much as digits as its factorization.

1221132020131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1221132020131 its reverse (1310202311221), we get a palindrome (2531334331352).

The spelling of 1221132020131 in words is "one trillion, two hundred twenty-one billion, one hundred thirty-two million, twenty thousand, one hundred thirty-one".