1221322310 has 32 divisors (see below), whose sum is σ = 2470426560. Its totient is φ = 431342208.

The previous prime is 1221322253. The next prime is 1221322351. The reversal of 1221322310 is 132231221.

It is a super-2 number, since 2×1221322310² = 2983256369807472200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201245 + ... + 207224.

It is an arithmetic number, because the mean of its divisors is an integer number (77200830).

Almost surely, 2^1221322310 is an apocalyptic number.

1221322310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221322310 is an abundant number, since it is smaller than the sum of its proper divisors (1249104250).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221322310 is a wasteful number, since it uses less digits than its factorization.

1221322310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408512.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1221322310 is about 34947.4220794610. The cubic root of 1221322310 is about 1068.9156365375.

Adding to 1221322310 its reverse (132231221), we get a palindrome (1353553531).

The spelling of 1221322310 in words is "one billion, two hundred twenty-one million, three hundred twenty-two thousand, three hundred ten".