31020000101320 has 96 divisors (see below), whose sum is σ = 73675149316920. Its totient is φ = 11752810629120.

The previous prime is 31020000101273. The next prime is 31020000101323. The reversal of 31020000101320 is 2310100002013.

It can be written as a sum of positive squares in 4 ways, for example, as 22761124223044 + 8258875878276 = 4770862^2 + 2873826^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31020000101320.

It is not an unprimeable number, because it can be changed into a prime (31020000101323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80397184 + ... + 80782096.

Almost surely, 2^{31020000101320} 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 31020000101320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36837574658460).

31020000101320 is an abundant number, since it is smaller than the sum of its proper divisors (42655149215600).

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

31020000101320 is a wasteful number, since it uses less digits than its factorization.

31020000101320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390543 (or 390520 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 31020000101320 its reverse (2310100002013), we get a palindrome (33330100103333).

The spelling of 31020000101320 in words is "thirty-one trillion, twenty billion, one hundred one thousand, three hundred twenty".