1221711073312 has 24 divisors (see below), whose sum is σ = 2405308405500. Its totient is φ = 610839097344.

The previous prime is 1221711073229. The next prime is 1221711073357. The reversal of 1221711073312 is 2133701171221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1064454412176 + 157256661136 = 1031724^2 + 396556^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 741064 + ... + 1729912.

Almost surely, 2^{1221711073312} is an apocalyptic number.

It is an amenable number.

1221711073312 is a deficient number, since it is larger than the sum of its proper divisors (1183597332188).

1221711073312 is an equidigital number, since it uses as much as digits as its factorization.

1221711073312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027468 (or 1027460 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 31.

The spelling of 1221711073312 in words is "one trillion, two hundred twenty-one billion, seven hundred eleven million, seventy-three thousand, three hundred twelve".