31231240121123 has 4 divisors (see below), whose sum is σ = 35692845852720. Its totient is φ = 26769634389528.

The previous prime is 31231240121113. The next prime is 31231240121129. The reversal of 31231240121123 is 32112104213213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31231240121123 - 2¹² = 31231240117027 is a prime.

It is a super-2 number, since 2×31231240121123² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31231240121092 and 31231240121101.

It is not an unprimeable number, because it can be changed into a prime (31231240121129) 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, 2230802865788 + ... + 2230802865801.

It is an arithmetic number, because the mean of its divisors is an integer number (8923211463180).

Almost surely, 2^{31231240121123} is an apocalyptic number.

31231240121123 is a deficient number, since it is larger than the sum of its proper divisors (4461605731597).

31231240121123 is an equidigital number, since it uses as much as digits as its factorization.

31231240121123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4461605731596.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 31231240121123 its reverse (32112104213213), we get a palindrome (63343344334336).

The spelling of 31231240121123 in words is "thirty-one trillion, two hundred thirty-one billion, two hundred forty million, one hundred twenty-one thousand, one hundred twenty-three".