31121332030 has 24 divisors (see below), whose sum is σ = 59507438328. Its totient is φ = 11716265088.

The previous prime is 31121332027. The next prime is 31121332037. The reversal of 31121332030 is 3023312113.

It is a junction number, because it is equal to n+sod(n) for n = 31121331989 and 31121332007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31121332037) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5381424 + ... + 5387203.

It is an arithmetic number, because the mean of its divisors is an integer number (2479476597).

Almost surely, 2^31121332030 is an apocalyptic number.

31121332030 is a deficient number, since it is larger than the sum of its proper divisors (28386106298).

31121332030 is a wasteful number, since it uses less digits than its factorization.

31121332030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10768668 (or 10768651 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 31121332030 its reverse (3023312113), we get a palindrome (34144644143).

The spelling of 31121332030 in words is "thirty-one billion, one hundred twenty-one million, three hundred thirty-two thousand, thirty".