121221022220131 has 2 divisors, whose sum is σ = 121221022220132. Its totient is φ = 121221022220130.

The previous prime is 121221022220117. The next prime is 121221022220141. The reversal of 121221022220131 is 131022220122121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121221022220131 - 2¹¹ = 121221022218083 is a prime.

It is a super-2 number, since 2×121221022220131² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121221022220141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (37) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610511110065 + 60610511110066.

It is an arithmetic number, because the mean of its divisors is an integer number (60610511110066).

Almost surely, 2^{121221022220131} is an apocalyptic number.

121221022220131 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221022220131 is an equidigital number, since it uses as much as digits as its factorization.

121221022220131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 121221022220131 its reverse (131022220122121), we get a palindrome (252243242342252).

The spelling of 121221022220131 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twenty-two million, two hundred twenty thousand, one hundred thirty-one".