1221330121130 has 32 divisors (see below), whose sum is σ = 2518779182976. Its totient is φ = 417686981184.

The previous prime is 1221330121111. The next prime is 1221330121153. The reversal of 1221330121130 is 311210331221.

It is a happy 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, 21946484 + ... + 22002063.

It is an arithmetic number, because the mean of its divisors is an integer number (78711849468).

Almost surely, 2^{1221330121130} is an apocalyptic number.

1221330121130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221330121130 is an abundant number, since it is smaller than the sum of its proper divisors (1297449061846).

1221330121130 is a wasteful number, since it uses less digits than its factorization.

1221330121130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43948958.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1221330121130 its reverse (311210331221), we get a palindrome (1532540452351).

The spelling of 1221330121130 in words is "one trillion, two hundred twenty-one billion, three hundred thirty million, one hundred twenty-one thousand, one hundred thirty".