31220130031200 has 216 divisors, whose sum is σ = 120098164147416. Its totient is φ = 7568516352000.

The previous prime is 31220130031199. The next prime is 31220130031241. The reversal of 31220130031200 is 213003102213.

31220130031200 is a `hidden beast` number, since 3 + 1 + 220 + 130 + 0 + 312 + 0 + 0 = 666.

It is a super-2 number, since 2×31220130031200² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 197017581 + ... + 197175980.

It is an arithmetic number, because the mean of its divisors is an integer number (556010019201).

Almost surely, 2^{31220130031200} is an apocalyptic number.

31220130031200 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31220130031200 is an abundant number, since it is smaller than the sum of its proper divisors (88878034116216).

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

31220130031200 is a wasteful number, since it uses less digits than its factorization.

31220130031200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394193598 (or 394193582 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31220130031200 its reverse (213003102213), we get a palindrome (31433133133413).

The spelling of 31220130031200 in words is "thirty-one trillion, two hundred twenty billion, one hundred thirty million, thirty-one thousand, two hundred".