31111121330 has 16 divisors (see below), whose sum is σ = 56037654360. Its totient is φ = 12436084992.

The previous prime is 31111121311. The next prime is 31111121333. The reversal of 31111121330 is 3312111113.

It can be written as a sum of positive squares in 4 ways, for example, as 21576965881 + 9534155449 = 146891^2 + 97643^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31111121299 and 31111121308.

It is not an unprimeable number, because it can be changed into a prime (31111121333) 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, 1029809 + ... + 1059588.

Almost surely, 2^31111121330 is an apocalyptic number.

31111121330 is a deficient number, since it is larger than the sum of its proper divisors (24926533030).

31111121330 is a wasteful number, since it uses less digits than its factorization.

31111121330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2090893.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 31111121330 its reverse (3312111113), we get a palindrome (34423232443).

The spelling of 31111121330 in words is "thirty-one billion, one hundred eleven million, one hundred twenty-one thousand, three hundred thirty".