31331331023123 has 4 divisors (see below), whose sum is σ = 31446944791008. Its totient is φ = 31215717255240.

The previous prime is 31331331023117. The next prime is 31331331023129. The reversal of 31331331023123 is 32132013313313.

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

It is an interprime number because it is at equal distance from previous prime (31331331023117) and next prime (31331331023129).

It is a cyclic number.

It is not a de Polignac number, because 31331331023123 - 2¹⁴ = 31331331006739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31331331023129) 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, 57806883536 + ... + 57806884077.

It is an arithmetic number, because the mean of its divisors is an integer number (7861736197752).

Almost surely, 2^{31331331023123} is an apocalyptic number.

31331331023123 is a deficient number, since it is larger than the sum of its proper divisors (115613767885).

31331331023123 is a wasteful number, since it uses less digits than its factorization.

31331331023123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115613767884.

The product of its (nonzero) digits is 8748, while the sum is 29.

Adding to 31331331023123 its reverse (32132013313313), we get a palindrome (63463344336436).

The spelling of 31331331023123 in words is "thirty-one trillion, three hundred thirty-one billion, three hundred thirty-one million, twenty-three thousand, one hundred twenty-three".