31321033232121 has 12 divisors (see below), whose sum is σ = 45262623484260. Its totient is φ = 20870936034720.

The previous prime is 31321033232113. The next prime is 31321033232161. The reversal of 31321033232121 is 12123233012313.

31321033232121 is a `hidden beast` number, since 3 + 1 + 3 + 2 + 1 + 0 + 332 + 321 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 24180193336896 + 7140839895225 = 4917336^2 + 2672235^2 .

It is not a de Polignac number, because 31321033232121 - 2³ = 31321033232113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31321033232161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 812711886 + ... + 812750423.

It is an arithmetic number, because the mean of its divisors is an integer number (3771885290355).

Almost surely, 2^{31321033232121} is an apocalyptic number.

It is an amenable number.

31321033232121 is a deficient number, since it is larger than the sum of its proper divisors (13941590252139).

31321033232121 is a wasteful number, since it uses less digits than its factorization.

31321033232121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1625464456 (or 1625464453 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 31321033232121 its reverse (12123233012313), we get a palindrome (43444266244434).

The spelling of 31321033232121 in words is "thirty-one trillion, three hundred twenty-one billion, thirty-three million, two hundred thirty-two thousand, one hundred twenty-one".