121021030387 has 2 divisors, whose sum is σ = 121021030388. Its totient is φ = 121021030386.

The previous prime is 121021030313. The next prime is 121021030393. The reversal of 121021030387 is 783030120121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121021030387 - 2¹¹ = 121021028339 is a prime.

It is not a weakly prime, because it can be changed into another prime (121021010387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60510515193 + 60510515194.

It is an arithmetic number, because the mean of its divisors is an integer number (60510515194).

Almost surely, 2^121021030387 is an apocalyptic number.

121021030387 is a deficient number, since it is larger than the sum of its proper divisors (1).

121021030387 is an equidigital number, since it uses as much as digits as its factorization.

121021030387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The spelling of 121021030387 in words is "one hundred twenty-one billion, twenty-one million, thirty thousand, three hundred eighty-seven".