141221501 has 2 divisors, whose sum is σ = 141221502. Its totient is φ = 141221500.

The previous prime is 141221473. The next prime is 141221519. The reversal of 141221501 is 105122141.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122124601 + 19096900 = 11051^2 + 4370^2 .

It is a cyclic number.

It is not a de Polignac number, because 141221501 - 2¹⁴ = 141205117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 141221501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (141221581) 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, 70610750 + 70610751.

It is an arithmetic number, because the mean of its divisors is an integer number (70610751).

Almost surely, 2^141221501 is an apocalyptic number.

It is an amenable number.

141221501 is a deficient number, since it is larger than the sum of its proper divisors (1).

141221501 is an equidigital number, since it uses as much as digits as its factorization.

141221501 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 17.

The square root of 141221501 is about 11883.6653015810. The cubic root of 141221501 is about 520.7551909276.

Adding to 141221501 its reverse (105122141), we get a palindrome (246343642).

The spelling of 141221501 in words is "one hundred forty-one million, two hundred twenty-one thousand, five hundred one".