31144123421331 has 8 divisors (see below), whose sum is σ = 41530912647120. Its totient is φ = 20760041571552.

The previous prime is 31144123421311. The next prime is 31144123421351. The reversal of 31144123421331 is 13312432144113.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (31144123421311) and next prime (31144123421351).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31144123421331 - 2²¹ = 31144121324179 is a prime.

It is a super-2 number, since 2×31144123421331² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31144123421292 and 31144123421301.

It is not an unprimeable number, because it can be changed into a prime (31144123421311) 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, 676817160 + ... + 676863173.

It is an arithmetic number, because the mean of its divisors is an integer number (5191364080890).

Almost surely, 2^{31144123421331} is an apocalyptic number.

31144123421331 is a deficient number, since it is larger than the sum of its proper divisors (10386789225789).

31144123421331 is a wasteful number, since it uses less digits than its factorization.

31144123421331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1353688005.

The product of its digits is 20736, while the sum is 33.

Adding to 31144123421331 its reverse (13312432144113), we get a palindrome (44456555565444).

The spelling of 31144123421331 in words is "thirty-one trillion, one hundred forty-four billion, one hundred twenty-three million, four hundred twenty-one thousand, three hundred thirty-one".