123021312012331 has 4 divisors (see below), whose sum is σ = 123022087787464. Its totient is φ = 123020536237200.

The previous prime is 123021312012329. The next prime is 123021312012341. The reversal of 123021312012331 is 133210213120321.

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 123021312012331 - 2¹ = 123021312012329 is a prime.

It is a super-2 number, since 2×123021312012331² (a number of 29 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 = 123021312012296 and 123021312012305.

It is not an unprimeable number, because it can be changed into a prime (123021312012311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 387649650 + ... + 387966871.

It is an arithmetic number, because the mean of its divisors is an integer number (30755521946866).

Almost surely, 2^{123021312012331} is an apocalyptic number.

123021312012331 is a deficient number, since it is larger than the sum of its proper divisors (775775133).

123021312012331 is an equidigital number, since it uses as much as digits as its factorization.

123021312012331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775775132.

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

Adding to 123021312012331 its reverse (133210213120321), we get a palindrome (256231525132652).

The spelling of 123021312012331 in words is "one hundred twenty-three trillion, twenty-one billion, three hundred twelve million, twelve thousand, three hundred thirty-one".