31301330121 has 32 divisors (see below), whose sum is σ = 49932374400. Its totient is φ = 19307151360.

The previous prime is 31301330117. The next prime is 31301330147. The reversal of 31301330121 is 12103310313.

It is a happy number.

31301330121 is a `hidden beast` number, since 31 + 301 + 330 + 1 + 2 + 1 = 666.

It is not a de Polignac number, because 31301330121 - 2² = 31301330117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31301330094 and 31301330103.

It is not an unprimeable number, because it can be changed into a prime (31301330101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 550840 + ... + 605001.

It is an arithmetic number, because the mean of its divisors is an integer number (1560386700).

Almost surely, 2^31301330121 is an apocalyptic number.

It is an amenable number.

31301330121 is a deficient number, since it is larger than the sum of its proper divisors (18631044279).

31301330121 is a wasteful number, since it uses less digits than its factorization.

31301330121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155926 (or 1155920 counting only the distinct ones).

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

Adding to 31301330121 its reverse (12103310313), we get a palindrome (43404640434).

The spelling of 31301330121 in words is "thirty-one billion, three hundred one million, three hundred thirty thousand, one hundred twenty-one".