321013019987 has 16 divisors (see below), whose sum is σ = 352399444992. Its totient is φ = 289998546720.

The previous prime is 321013019927. The next prime is 321013019989. The reversal of 321013019987 is 789910310123.

It is a cyclic number.

It is not a de Polignac number, because 321013019987 - 2²⁰ = 321011971411 is a prime.

It is a super-2 number, since 2×321013019987² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321013019989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1248848 + ... + 1483794.

It is an arithmetic number, because the mean of its divisors is an integer number (22024965312).

Almost surely, 2^321013019987 is an apocalyptic number.

321013019987 is a deficient number, since it is larger than the sum of its proper divisors (31386425005).

321013019987 is a wasteful number, since it uses less digits than its factorization.

321013019987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235738.

The product of its (nonzero) digits is 81648, while the sum is 44.

The spelling of 321013019987 in words is "three hundred twenty-one billion, thirteen million, nineteen thousand, nine hundred eighty-seven".