12021121501 has 2 divisors, whose sum is σ = 12021121502. Its totient is φ = 12021121500.

The previous prime is 12021121493. The next prime is 12021121529. The reversal of 12021121501 is 10512112021.

12021121501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10601791225 + 1419330276 = 102965^2 + 37674^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021121501 - 2³ = 12021121493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12021121531) 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, 6010560750 + 6010560751.

It is an arithmetic number, because the mean of its divisors is an integer number (6010560751).

Almost surely, 2^12021121501 is an apocalyptic number.

It is an amenable number.

12021121501 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021121501 is an equidigital number, since it uses as much as digits as its factorization.

12021121501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40, while the sum is 16.

Adding to 12021121501 its reverse (10512112021), we get a palindrome (22533233522).

The spelling of 12021121501 in words is "twelve billion, twenty-one million, one hundred twenty-one thousand, five hundred one".