31133144032321 has 4 divisors (see below), whose sum is σ = 32486758990272. Its totient is φ = 29779529074372.

The previous prime is 31133144032241. The next prime is 31133144032337. The reversal of 31133144032321 is 12323044133113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31133144032321 - 2¹¹ = 31133144030273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31133144032421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 676807478941 + ... + 676807478986.

It is an arithmetic number, because the mean of its divisors is an integer number (8121689747568).

Almost surely, 2^{31133144032321} is an apocalyptic number.

It is an amenable number.

31133144032321 is a deficient number, since it is larger than the sum of its proper divisors (1353614957951).

31133144032321 is a wasteful number, since it uses less digits than its factorization.

31133144032321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1353614957950.

The product of its (nonzero) digits is 15552, while the sum is 31.

Adding to 31133144032321 its reverse (12323044133113), we get a palindrome (43456188165434).

The spelling of 31133144032321 in words is "thirty-one trillion, one hundred thirty-three billion, one hundred forty-four million, thirty-two thousand, three hundred twenty-one".