121020131 has 2 divisors, whose sum is σ = 121020132. Its totient is φ = 121020130.

The previous prime is 121020113. The next prime is 121020143. The reversal of 121020131 is 131020121.

Together with previous prime (121020113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121020131 - 2²² = 116825827 is a prime.

It is a super-2 number, since 2×121020131² = 29291744214514322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121020191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60510065 + 60510066.

It is an arithmetic number, because the mean of its divisors is an integer number (60510066).

Almost surely, 2^121020131 is an apocalyptic number.

121020131 is a deficient number, since it is larger than the sum of its proper divisors (1).

121020131 is an equidigital number, since it uses as much as digits as its factorization.

121020131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 121020131 is about 11000.9150073982. The cubic root of 121020131 is about 494.6361724695.

Adding to 121020131 its reverse (131020121), we get a palindrome (252040252).

The spelling of 121020131 in words is "one hundred twenty-one million, twenty thousand, one hundred thirty-one".