31233120021231 has 8 divisors (see below), whose sum is σ = 41644515644160. Its totient is φ = 20821902206232.

The previous prime is 31233120021221. The next prime is 31233120021277. The reversal of 31233120021231 is 13212002133213.

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

It is not a de Polignac number, because 31233120021231 - 2¹¹ = 31233120019183 is a prime.

It is a super-2 number, since 2×31233120021231² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31233120021221) 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, 44041575 + ... + 44745128.

It is an arithmetic number, because the mean of its divisors is an integer number (5205564455520).

Almost surely, 2^{31233120021231} is an apocalyptic number.

31233120021231 is a deficient number, since it is larger than the sum of its proper divisors (10411395622929).

31233120021231 is a wasteful number, since it uses less digits than its factorization.

31233120021231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88903965.

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

Adding to 31233120021231 its reverse (13212002133213), we get a palindrome (44445122154444).

The spelling of 31233120021231 in words is "thirty-one trillion, two hundred thirty-three billion, one hundred twenty million, twenty-one thousand, two hundred thirty-one".