31012333220121 has 16 divisors (see below), whose sum is σ = 45109073051328. Its totient is φ = 18795259828800.

The previous prime is 31012333220093. The next prime is 31012333220191. The reversal of 31012333220121 is 12102233321013.

It is not a de Polignac number, because 31012333220121 - 2¹¹ = 31012333218073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31012333220091 and 31012333220100.

It is not an unprimeable number, because it can be changed into a prime (31012333220191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4699311 + ... + 9171051.

It is an arithmetic number, because the mean of its divisors is an integer number (2819317065708).

Almost surely, 2^{31012333220121} is an apocalyptic number.

It is an amenable number.

31012333220121 is a deficient number, since it is larger than the sum of its proper divisors (14096739831207).

31012333220121 is a wasteful number, since it uses less digits than its factorization.

31012333220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4681912.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 31012333220121 its reverse (12102233321013), we get a palindrome (43114566541134).

The spelling of 31012333220121 in words is "thirty-one trillion, twelve billion, three hundred thirty-three million, two hundred twenty thousand, one hundred twenty-one".