321740356557212 has 24 divisors (see below), whose sum is σ = 563807188363776. Its totient is φ = 160652591347248.

The previous prime is 321740356557211. The next prime is 321740356557229. The reversal of 321740356557212 is 212755653047123.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321740356557211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 629591633 + ... + 630102455.

It is an arithmetic number, because the mean of its divisors is an integer number (23491966181824).

Almost surely, 2^{321740356557212} is an apocalyptic number.

It is an amenable number.

321740356557212 is a deficient number, since it is larger than the sum of its proper divisors (242066831806564).

321740356557212 is a wasteful number, since it uses less digits than its factorization.

321740356557212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723497 (or 723495 counting only the distinct ones).

The product of its (nonzero) digits is 10584000, while the sum is 53.

The spelling of 321740356557212 in words is "three hundred twenty-one trillion, seven hundred forty billion, three hundred fifty-six million, five hundred fifty-seven thousand, two hundred twelve".