31321230211231 has 8 divisors (see below), whose sum is σ = 33166600721424. Its totient is φ = 29476186945920.

The previous prime is 31321230211211. The next prime is 31321230211259. The reversal of 31321230211231 is 13211203212313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31321230211231 - 2³⁹ = 30771474397343 is a prime.

It is a super-2 number, since 2×31321230211231² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31321230211196 and 31321230211205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31321230211211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81614145 + ... + 81997018.

It is an arithmetic number, because the mean of its divisors is an integer number (4145825090178).

Almost surely, 2^{31321230211231} is an apocalyptic number.

31321230211231 is a deficient number, since it is larger than the sum of its proper divisors (1845370510193).

31321230211231 is a wasteful number, since it uses less digits than its factorization.

31321230211231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163622441.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 31321230211231 its reverse (13211203212313), we get a palindrome (44532433423544).

The spelling of 31321230211231 in words is "thirty-one trillion, three hundred twenty-one billion, two hundred thirty million, two hundred eleven thousand, two hundred thirty-one".