1221708710 has 16 divisors (see below), whose sum is σ = 2294688096. Its totient is φ = 467436288.

The previous prime is 1221708703. The next prime is 1221708713. The reversal of 1221708710 is 178071221.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221708713) 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, 2655659 + ... + 2656118.

It is an arithmetic number, because the mean of its divisors is an integer number (143418006).

Almost surely, 2^1221708710 is an apocalyptic number.

1221708710 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221708710 is a deficient number, since it is larger than the sum of its proper divisors (1072979386).

1221708710 is a wasteful number, since it uses less digits than its factorization.

1221708710 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5311807.

The product of its (nonzero) digits is 1568, while the sum is 29.

The square root of 1221708710 is about 34952.9499470359. The cubic root of 1221708710 is about 1069.0283519249.

Adding to 1221708710 its reverse (178071221), we get a palindrome (1399779931).

The spelling of 1221708710 in words is "one billion, two hundred twenty-one million, seven hundred eight thousand, seven hundred ten".