31130121033 has 48 divisors (see below), whose sum is σ = 50045636160. Its totient is φ = 18487497600.

The previous prime is 31130120993. The next prime is 31130121053. The reversal of 31130121033 is 33012103113.

It is a happy number.

31130121033 is a `hidden beast` number, since 311 + 301 + 21 + 0 + 33 = 666.

It is not a de Polignac number, because 31130121033 - 2²¹ = 31128023881 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31130120997 and 31130121015.

It is not an unprimeable number, because it can be changed into a prime (31130121053) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1614910 + ... + 1634072.

It is an arithmetic number, because the mean of its divisors is an integer number (1042617420).

Almost surely, 2^31130121033 is an apocalyptic number.

31130121033 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

31130121033 is a deficient number, since it is larger than the sum of its proper divisors (18915515127).

31130121033 is a wasteful number, since it uses less digits than its factorization.

31130121033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19510 (or 19507 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 31130121033 its reverse (33012103113), we get a palindrome (64142224146).

The spelling of 31130121033 in words is "thirty-one billion, one hundred thirty million, one hundred twenty-one thousand, thirty-three".