121020501 has 16 divisors (see below), whose sum is σ = 195260544. Its totient is φ = 65086464.

The previous prime is 121020463. The next prime is 121020521. The reversal of 121020501 is 105020121.

It is not a de Polignac number, because 121020501 - 2⁶ = 121020437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121020521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169140 + ... + 169853.

It is an arithmetic number, because the mean of its divisors is an integer number (12203784).

Almost surely, 2^121020501 is an apocalyptic number.

It is an amenable number.

121020501 is a deficient number, since it is larger than the sum of its proper divisors (74240043).

121020501 is a wasteful number, since it uses less digits than its factorization.

121020501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339020.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 121020501 is about 11000.9318241684. The cubic root of 121020501 is about 494.6366765597.

Adding to 121020501 its reverse (105020121), we get a palindrome (226040622).

The spelling of 121020501 in words is "one hundred twenty-one million, twenty thousand, five hundred one".