31130031231200 has 288 divisors, whose sum is σ = 86550624468000. Its totient is φ = 10829384294400.

The previous prime is 31130031231161. The next prime is 31130031231253. The reversal of 31130031231200 is 213213003113.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27257246 + ... + 28376354.

It is an arithmetic number, because the mean of its divisors is an integer number (300523001625).

Almost surely, 2^{31130031231200} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31130031231200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43275312234000).

31130031231200 is an abundant number, since it is smaller than the sum of its proper divisors (55420593236800).

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

31130031231200 is a wasteful number, since it uses less digits than its factorization.

31130031231200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1119278 (or 1119265 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31130031231200 its reverse (213213003113), we get a palindrome (31343244234313).

The spelling of 31130031231200 in words is "thirty-one trillion, one hundred thirty billion, thirty-one million, two hundred thirty-one thousand, two hundred".