121420501 has 2 divisors, whose sum is σ = 121420502. Its totient is φ = 121420500.

The previous prime is 121420391. The next prime is 121420553. The reversal of 121420501 is 105024121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62821476 + 58599025 = 7926^2 + 7655^2 .

It is a cyclic number.

It is not a de Polignac number, because 121420501 - 2⁷ = 121420373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121429501) 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, 60710250 + 60710251.

It is an arithmetic number, because the mean of its divisors is an integer number (60710251).

Almost surely, 2^121420501 is an apocalyptic number.

It is an amenable number.

121420501 is a deficient number, since it is larger than the sum of its proper divisors (1).

121420501 is an equidigital number, since it uses as much as digits as its factorization.

121420501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 121420501 is about 11019.0971045726. The cubic root of 121420501 is about 495.1810391089.

Adding to 121420501 its reverse (105024121), we get a palindrome (226444622).

The spelling of 121420501 in words is "one hundred twenty-one million, four hundred twenty thousand, five hundred one".