1221003010 has 8 divisors (see below), whose sum is σ = 2197805436. Its totient is φ = 488401200.

The previous prime is 1221002963. The next prime is 1221003031. The reversal of 1221003010 is 103001221.

It can be written as a sum of positive squares in 2 ways, for example, as 1164106161 + 56896849 = 34119^2 + 7543^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (10), and also a Moran number because the ratio is a prime number: 122100301 = 1221003010 / (1 + 2 + 2 + 1 + 0 + 0 + 3 + 0 + 1 + 0).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61050141 + ... + 61050160.

Almost surely, 2^1221003010 is an apocalyptic number.

1221003010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221003010 is a deficient number, since it is larger than the sum of its proper divisors (976802426).

1221003010 is a wasteful number, since it uses less digits than its factorization.

1221003010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122100308.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1221003010 is about 34942.8534896622. The cubic root of 1221003010 is about 1068.8224767146.

Adding to 1221003010 its reverse (103001221), we get a palindrome (1324004231).

The spelling of 1221003010 in words is "one billion, two hundred twenty-one million, three thousand, ten".