31143211130000 has 50 divisors (see below), whose sum is σ = 75400828491054. Its totient is φ = 12457284448000.

The previous prime is 31143211129999. The next prime is 31143211130081. The reversal of 31143211130000 is 3111234113.

It can be written as a sum of positive squares in 5 ways, for example, as 9974783090944 + 21168428039056 = 3158288^2 + 4600916^2 .

It is a tau number, because it is divible by the number of its divisors (50).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1557150557 + ... + 1557170556.

Almost surely, 2^{31143211130000} is an apocalyptic number.

It is an amenable number.

31143211130000 is an abundant number, since it is smaller than the sum of its proper divisors (44257617361054).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31143211130000 is an equidigital number, since it uses as much as digits as its factorization.

31143211130000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3114321141 (or 3114321120 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 31143211130000 its reverse (3111234113), we get a palindrome (31146322364113).

The spelling of 31143211130000 in words is "thirty-one trillion, one hundred forty-three billion, two hundred eleven million, one hundred thirty thousand".