1221301010 has 16 divisors (see below), whose sum is σ = 2224829376. Its totient is φ = 482634288.

The previous prime is 1221301001. The next prime is 1221301013. The reversal of 1221301010 is 101031221.

It is a junction number, because it is equal to n+sod(n) for n = 1221300982 and 1221301000.

It is not an unprimeable number, because it can be changed into a prime (1221301013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 734894 + ... + 736553.

It is an arithmetic number, because the mean of its divisors is an integer number (139051836).

Almost surely, 2^1221301010 is an apocalyptic number.

1221301010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221301010 is a deficient number, since it is larger than the sum of its proper divisors (1003528366).

1221301010 is a wasteful number, since it uses less digits than its factorization.

1221301010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471537.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1221301010 is about 34947.1173346243. The cubic root of 1221301010 is about 1068.9094224980.

Adding to 1221301010 its reverse (101031221), we get a palindrome (1322332231).

The spelling of 1221301010 in words is "one billion, two hundred twenty-one million, three hundred one thousand, ten".