1221330010012 has 48 divisors (see below), whose sum is σ = 2462495859712. Its totient is φ = 519186931200.

The previous prime is 1221330009959. The next prime is 1221330010049. The reversal of 1221330010012 is 2100100331221.

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, 2630833 + ... + 3060055.

Almost surely, 2^{1221330010012} is an apocalyptic number.

It is an amenable number.

1221330010012 is an abundant number, since it is smaller than the sum of its proper divisors (1241165849700).

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

1221330010012 is a wasteful number, since it uses less digits than its factorization.

1221330010012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430058 (or 430056 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1221330010012 its reverse (2100100331221), we get a palindrome (3321430341233).

The spelling of 1221330010012 in words is "one trillion, two hundred twenty-one billion, three hundred thirty million, ten thousand, twelve".