1011321400239 has 16 divisors (see below), whose sum is σ = 1498269945600. Its totient is φ = 674207058168.

The previous prime is 1011321400237. The next prime is 1011321400279. The reversal of 1011321400239 is 9320041231101.

1011321400239 is a `hidden beast` number, since 1 + 0 + 1 + 1 + 3 + 21 + 400 + 239 = 666.

It is not a de Polignac number, because 1011321400239 - 2¹ = 1011321400237 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011321400237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3893382 + ... + 4145004.

It is an arithmetic number, because the mean of its divisors is an integer number (93641871600).

Almost surely, 2^{1011321400239} is an apocalyptic number.

1011321400239 is a deficient number, since it is larger than the sum of its proper divisors (486948545361).

1011321400239 is a wasteful number, since it uses less digits than its factorization.

1011321400239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400491 (or 400485 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The spelling of 1011321400239 in words is "one trillion, eleven billion, three hundred twenty-one million, four hundred thousand, two hundred thirty-nine".