1010221501 has 4 divisors (see below), whose sum is σ = 1011903004. Its totient is φ = 1008540000.

The previous prime is 1010221477. The next prime is 1010221517. The reversal of 1010221501 is 1051220101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 666156100 + 344065401 = 25810^2 + 18549^2 .

It is a cyclic number.

It is not a de Polignac number, because 1010221501 - 2²⁹ = 473350589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010221001) 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 in 3 ways as a sum of consecutive naturals, for example, 839850 + ... + 841051.

It is an arithmetic number, because the mean of its divisors is an integer number (252975751).

Almost surely, 2^1010221501 is an apocalyptic number.

It is an amenable number.

1010221501 is a deficient number, since it is larger than the sum of its proper divisors (1681503).

1010221501 is an equidigital number, since it uses as much as digits as its factorization.

1010221501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1681502.

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 1010221501 is about 31783.9818304756. The cubic root of 1010221501 is about 1003.3956236890.

Adding to 1010221501 its reverse (1051220101), we get a palindrome (2061441602).

The spelling of 1010221501 in words is "one billion, ten million, two hundred twenty-one thousand, five hundred one".