1501221010 has 16 divisors (see below), whose sum is σ = 2706765336. Its totient is φ = 599473408.

The previous prime is 1501220999. The next prime is 1501221013. The reversal of 1501221010 is 101221051.

It can be written as a sum of positive squares in 4 ways, for example, as 1349019441 + 152201569 = 36729^2 + 12337^2 .

It is not an unprimeable number, because it can be changed into a prime (1501221013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120649 + ... + 132508.

Almost surely, 2^1501221010 is an apocalyptic number.

1501221010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1501221010 is a deficient number, since it is larger than the sum of its proper divisors (1205544326).

1501221010 is a wasteful number, since it uses less digits than its factorization.

1501221010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253757.

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

The square root of 1501221010 is about 38745.5934268660. The cubic root of 1501221010 is about 1145.0247599891.

Adding to 1501221010 its reverse (101221051), we get a palindrome (1602442061).

The spelling of 1501221010 in words is "one billion, five hundred one million, two hundred twenty-one thousand, ten".