31111101101320 has 32 divisors (see below), whose sum is σ = 70000548600600. Its totient is φ = 12444338907648.

The previous prime is 31111101101309. The next prime is 31111101101321. The reversal of 31111101101320 is 2310110111113.

It can be written as a sum of positive squares in 4 ways, for example, as 21422660485444 + 9688440615876 = 4628462^2 + 3112626^2 .

It is a super-2 number, since 2×31111101101320² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31111101101294 and 31111101101303.

It is not an unprimeable number, because it can be changed into a prime (31111101101321) 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 7 ways as a sum of consecutive naturals, for example, 1890772 + ... + 8111548.

Almost surely, 2^{31111101101320} is an apocalyptic number.

It is an amenable number.

31111101101320 is an abundant number, since it is smaller than the sum of its proper divisors (38889447499280).

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

31111101101320 is a wasteful number, since it uses less digits than its factorization.

31111101101320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6345817 (or 6345813 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 16.

Adding to 31111101101320 its reverse (2310110111113), we get a palindrome (33421211212433).

The spelling of 31111101101320 in words is "thirty-one trillion, one hundred eleven billion, one hundred one million, one hundred one thousand, three hundred twenty".