1221505451312 has 20 divisors (see below), whose sum is σ = 2366865411960. Its totient is φ = 610701474048.

The previous prime is 1221505451311. The next prime is 1221505451321. The reversal of 1221505451312 is 2131545051221.

It is not an unprimeable number, because it can be changed into a prime (1221505451311) by changing a digit.

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, 3006233 + ... + 3388280.

It is an arithmetic number, because the mean of its divisors is an integer number (118343270598).

Almost surely, 2^{1221505451312} is an apocalyptic number.

It is an amenable number.

1221505451312 is a deficient number, since it is larger than the sum of its proper divisors (1145359960648).

1221505451312 is a wasteful number, since it uses less digits than its factorization.

1221505451312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6406460 (or 6406454 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 32.

The spelling of 1221505451312 in words is "one trillion, two hundred twenty-one billion, five hundred five million, four hundred fifty-one thousand, three hundred twelve".