1221313132330 has 32 divisors (see below), whose sum is σ = 2203695648000. Its totient is φ = 487340692992.

The previous prime is 1221313132297. The next prime is 1221313132343. The reversal of 1221313132330 is 332313131221.

It is a junction number, because it is equal to n+sod(n) for n = 1221313132295 and 1221313132304.

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, 37733434 + ... + 37765786.

It is an arithmetic number, because the mean of its divisors is an integer number (68865489000).

Almost surely, 2^{1221313132330} is an apocalyptic number.

1221313132330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221313132330 is a deficient number, since it is larger than the sum of its proper divisors (982382515670).

1221313132330 is a wasteful number, since it uses less digits than its factorization.

1221313132330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41398.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 1221313132330 its reverse (332313131221), we get a palindrome (1553626263551).

The spelling of 1221313132330 in words is "one trillion, two hundred twenty-one billion, three hundred thirteen million, one hundred thirty-two thousand, three hundred thirty".