321153011218 has 16 divisors (see below), whose sum is σ = 532806868440. Its totient is φ = 144218399616.

The previous prime is 321153011203. The next prime is 321153011219. The reversal of 321153011218 is 812110351123.

It can be written as a sum of positive squares in 4 ways, for example, as 206322167529 + 114830843689 = 454227^2 + 338867^2 .

It is a super-2 number, since 2×321153011218² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (321153011219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166918483 + ... + 166920406.

Almost surely, 2^321153011218 is an apocalyptic number.

321153011218 is a deficient number, since it is larger than the sum of its proper divisors (211653857222).

321153011218 is a wasteful number, since it uses less digits than its factorization.

321153011218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333838941.

The product of its (nonzero) digits is 1440, while the sum is 28.

The spelling of 321153011218 in words is "three hundred twenty-one billion, one hundred fifty-three million, eleven thousand, two hundred eighteen".